Yazar "Kurkcuoglu, Gunes Suheyla" seçeneğine göre listele

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    1D heteronuclear coordination polymers of hexacyanocobaltate(III) with 2-hydroxymethylpyridine
    (Pergamon-Elsevier Science Ltd, 2024) Kekec, Seray; Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sahin, Onur
    Three new hexacyanocobaltate(III) complexes, {[M 2 (hmpy) 4 Co( mu- CN) 4 (CN) 2 ] center dot 2H 2 O} n (M = Cu(II) ( 1 ), Zn(II) ( 2 ) and Cd(II) ( 3 )) were synthesized with 2-hydroxymethylpyridine (hmpy) ligand, and characterized by vibration (FT - IR and Raman) spectral, single crystal X-ray diffraction (SC-XRD) and powder X-ray diffraction (PXRD), thermal and elemental analyses techniques. The crystallographic analyses revealed that cyanide complexes 1 - 3 are infinite one-dimensional coordination polymers. Each M ion is coordinated by two nitrogen and two oxygen atoms from the hmpy ligands and two nitrogen atoms from the cyanide ligands, displaying a distorted octahedral coordination geometry. Similarly, each Co(III) ion is coordinated by six carbon atoms from cyanide ligands to form a distorted octahedral coordination geometry. These complexes form 3D supramolecular networks through O - H & sdot;& sdot;& sdot; O hydrogen bonds and C - H & sdot;& sdot;& sdot; N interactions. Additionally, structural analyses such as metal salts, pH values of the compounds obtained under different conditions were evaluated. A synthesis -structural analyses relation was made from these data.
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    Cyanide bridged hetero-metallic polymeric complexes: Syntheses, vibrational spectra, thermal analyses and crystal structures of complexes [M(1,2-dmi)2Ni(μ-CN)4]n (M = Zn(II) and Cd(II))
    (Elsevier Science Bv, 2015) Kurkcuoglu, Gunes Suheyla; Sayin, Elvan; Sahin, Onur
    Two cyanide bridged hetero-metallic complexes of general formula, (M(1,2-dmi)(2)Ni(mu-CN)(4)](n) (1,2-dmi = 1,2-dimethylimidazole and M = Zn(II) or Cd(II)) have been synthesized and characterized by vibrational (FT-IR and Raman) spectroscopy, single crystal X-ray diffraction, thermal analyses and elemental analyses. The crystallographic analyses reveal that the complexes, [Zn(1,2-dmi)(2)Ni(mu-CN)(4)] (1) and [Cd(1,2-dmi)(2)Ni(mu-CN)(4)] (2), have polymeric 2D networks. In the complexes, four cyanide groups of [Ni(CN)(4)](2-) coordinated to the adjacent M(II) ions and distorted octahedral geometries of complexes are completed by two nitrogen atoms of trans 1,2-dmi ligands. The structures of I and 2 are similar and linked via intermolecular hydrogen bonding, C-H center dot center dot center dot Ni interactions to give rise to 3D networks. Vibration assignments are given for all the observed bands and the spectral features also supported to the crystal structures of heteronuclear complexes. The FT-IR and Raman spectra of the complexes are very much consistent with the structural data presented. (c) 2015 Elsevier B.V. All rights reserved.
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    Dinuclear zinc(II) complex with tris(2-aminoethyl) amine ligand: synthesis, structure and properties
    (Walter De Gruyter Gmbh, 2015) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sahin, Onur; Sayin, Elvan; Buyukgungor, Orhan
    The dinuclear complex tris(2-aminoethyl) aminezinc(II)-mu-cyanothreecyanozincate(II) hemihydrate, [Zn(tren) Zn(mu-CN)(CN)(3)]center dot 0.5H(2)O (1) (tren = tris(2-aminoethyl)amine), has been synthesized and characterized by spectral (FT-IR and Raman), elemental, thermal analysis (TG, DTG and DTA) as well as single crystal X-ray diffraction techniques. The asymmetric unit is composed of two Zn(II) ions, one tren ligand, four cyanide ligands and a half crystal water molecule which is situated at the special position. Zn1 ion exhibits tetrahedral coordination geometry with four carbon atoms of four cyanide ligands. Zn2 ion is five-coordinated by five nitrogen atoms from one tren and one cyanide ligands in a trigonal bipyramid coordination geometry. The cyanide nitrogen is in the axial position. Adjacent dinuclear units are connected by hydrogen bonding interactions to form three dimensional network. The decomposition reaction takes place in the temperature range 30-700 degrees C in the static air atmosphere.
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    Experimental and theoretical studies on the molecular structures and vibrational spectra of cyanide complexes with 1,2-dimethylimidazole: [M(dmi)2Ni(μ-CN)4] (M = Cu, Zn or Cd)
    (Elsevier, 2020) Kurkcuoglu, Gunes Suheyla; Kavlak, Ilkan; Kinik, Biray; Sahin, Onur
    A new Cu(II)/Ni(II) heterometallic cyanide-bridged complex of 1,2-dimethylimidazole (dmi), [Cu(dmi)(2)-Ni(mu-CN)(4)](n) was synthesized and its structure was characterized by FT-IR, Raman, single-crystal X-ray diffraction (SC-XRD) and thermal/elemental analysis techniques. In our previous study, we reported cyanide-bridged zinc(II) and cadmium(II) complexes with 1,2-dimethylimidazole (dmi), [M(dmi)(2)Ni(mu-CN)(4)](n) (M(II) = Zn or Cd), and determined their structures, experimentally. The crystallographic analyses reveal that the complexes have polymeric 2D networks. In the complexes, four cyanide groups of [Ni(CN)4](2-) coordinated to the adjacent M(II) ions and distorted octahedral geometries of the complexes are completed by two nitrogen atoms of trans dmi ligands. The structures of the complexes similar and linked via intermolecular hydrogen bonding, C-H center dot center dot center dot Ni interactions to give rise to 3D networks. The optimized geometric parameters, normal mode frequencies and corresponding vibrational assignments of the complexes were examined by means of the density functional theory (DFT) method, the Becke-3-Lee-Yang-Parr (B3LYP) functional and the LANL2DZ basis set. Additionally, the optimized geometries were investigated with time depended density functional theory (TD-DFT) method and the LANL2DZ basis set on the singlet and triplet states in order to obtain electronic transitions. These results were provided the electronic behaviors during the excitations on the complexes and dmi. (C) 2019 Elsevier B.V. All rights reserved.
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    Heteronuclear Hexacyanometallate(III) Coordination Polymers (Cd/Cr, Cd/Fe, Cd/Co) with 3-(Aminomethyl)pyridine: Synthesis, Characterization, and Catalytic Activities for the Peroxidative Oxidation of Benzylic Alcohols
    (Springer, 2024) Kekec, Seray; Kurkcuoglu, Gunes Suheyla; Unver, Hakan; Sahin, Onur; Yesilel, Okan Zafer
    Three new heteronuclear hexacyanometallate(III) coordination polymers (CPs), [Cd3(mu-3ampy)4(H2O)4Cr2(mu-CN)8(CN)4]n (1), [Cd3(mu-3ampy)2(H2O)2Fe2(mu-CN)5(CN)7]n (2) and [Cd3(mu-3ampy)4(H2O)4Co2(mu-CN)8(CN)4]n (3), were synthesized with 3-(aminomethyl)pyridine (3ampy) ligand. All CPs were characterized by FT-IR, Raman, elemental, thermal analysis as well as single crystal X-ray diffraction and powder X-ray diffraction techniques. The single crystal X-ray diffraction analyses shows that the CPs 1 and 3 are two-dimensional structures, whereas CP 2 is a three-dimensional structure where two adjacent metal ions ions are linked via 3ampy and CN bridges. The coordination spheres of all CPs show distorted octahedral geometries. CP 3 was mainly tested as heterogenous catalyst for peroxidative oxidation of benzyl alcohol and its derivatives (4-chloro, 4-bromo, 4-methyl, 4-metoxy and 4-nitro benzyl alcohol). From the results, the highest aldehyde formation was obtained from the oxidation of benzyl alcohol with overall yield as 100%. In addition, catalytic reactions exhibited high selectivity towards aldehyde and no over-oxidation product (carboxylic acid) was observed.
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    Investigation of structural analysis and thermostatic properties of thermal and UV stabilizer as organometallic Sn(II), Cu(II) and Cd(II) barbiturate complexes
    (Elsevier Science Bv, 2019) Kavlak, Ilkan; Kurkcuoglu, Gunes Suheyla; Sahin, Onur
    In this study, five new organometallic barbiturate complexes which are described in Cu(C4H3-N2O3)(2)center dot 2H(2)O (1), Cd(C4H3N2O3)(2)center dot 4H(2)O (2), Sn(C4H3N2O3)(4)center dot 4H(2)O (3), Sn(C4H3N2O3)(2)center dot Ni(B4O7)center dot 4H(2)O (4), Sn(C4H3N2O3)(2)center dot Cu(B4O7)center dot 3H(2)O (5) have been synthesized. Their contribution to the thermal and UV stabilization of PVC was investigated by thermostatic analysis via according to ISO 182-2 standard. Additionally, the structural properties of the synthesized complexes were investigated by elemental analysis, powder XRD and vibrational (FT-IR and Raman) spectroscopic techniques. Furthermore, complex 1 has been investigated by single crystal X-ray diffraction technique. The results are shown that synthesized complexes act as HCl scavengers during the PVC decomposition. The thermal decay of PVC dough, which is including in new generation plastic additives, are following: 1 > 3> 5 > 2>4. (C) 2019 Elsevier B.V. All rights reserved.
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    Nine new tetracyanometallate(II) complexes with 2-(2-aminoethyl)pyridine: synthesis, crystal structures and spectroscopic studies
    (Taylor & Francis Ltd, 2022) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sayin, Elvan; Sahin, Onur
    Nine new cyanide complexes, {[Cu(aepy)(2)M(mu-CN)(CN)(3)]center dot 2H(2)O}(n) [M(II) = Ni (1), Pd (2) or Pt (3)], [Zn(aepy)(2)M(mu-CN)(CN)(3)](n) [M = Ni (4), Pd (5) or Pt (6)] and [Cd(aepy)(2)M(mu-CN)(CN)(3)](n) [M(II) = Ni (7) or Pd (8)] and (Haepy)(2)[Pt(CN)(4)] (9) (aepy = 2-(2-aminoethyl)pyridine), were synthesized and characterized structurally using single crystal X-ray diffraction, vibrational spectroscopy, thermal and elemental analyses. The structure analyses revealed that cyanide complexes 1-3 for Cu(II) and 4-6 for Zn(II) are heterobinuclear clusters, whereas the two Cd(II) complexes 7 and 8 are infinite one-dimensional coordination polymers. In heterometallic complexes 7 and 8, the Cd(II) ions are located on a center of symmetry and are coordinated by two nitrogens from cyanide ligands and four nitrogens from aepy ligands, thus showing a distorted octahedral geometry. In 1-9, the intermolecular N-H center dot center dot center dot N hydrogen bonds or/and C-H center dot center dot center dot M interactions (M = Ni(II), Pd(II) and Pt(II)) generate 3D supramolecular networks.
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    One dimensional coordination polymers: Synthesis, crystal structures and spectroscopic properties
    (Elsevier Science Bv, 2016) Karaagac, Dursun; Kurkcuoglu, Gunes Suheyla; Senyel, Mustafa; Sahin, Onur
    Two new one dimensional (1D) cyanide complexes, namely [M(4-aepy)(2)(H2O)(2)][Pt(CN)(4)], (4-aepy = 4-(2-aminoethyl)pyridine M = Cu(II) (1) or Zn(II) (2)), have been synthesized and characterized by vibrational (FT-IR and Raman) spectroscopy, single crystal X-ray diffraction, thermal and elemental analyses techniques. The crystallographic analyses reveal that 1 and 2 are isomorphous and isostructural, and crystallize in the monoclinic system and C2 space group. The Pt(II) ions are coordinated by four cyanide-carbon atoms in the square-planar geometry and the [Pt(CN)4]2 ions act as a counter ion. The M(II) ions display an N4O2 coordination sphere with a distorted octahedral geometry, the nitrogen donors belonging to four molecules of the organic 4-aepy that act as unidentate ligands and two oxygen atoms from aqua ligands. The crystal structures of 1 and 2 are similar each other and linked via intermolecular hydrogen bonding, Pt center dot center dot center dot pi interactions to form 3D supramolecular network. Vibration assignments of all the observed bands are given and the spectral features also supported to the crystal structures of the complexes. (C) 2016 Elsevier B.V. All rights reserved.
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    One-dimensional heteronuclear complexes with cyanide and 2-ethylimidazole ligands
    (Taylor & Francis Inc, 2021) Kurkcuoglu, Gunes Suheyla; Sayin, Elvan; Yavuz, Tugba; Sahin, Onur
    Two tetracyanonickelate(II) complexes with 2-ethylimidazole ligand have been synthesized as single crystal form and characterized by spectroscopic (infrared and Raman) and single crystal X-ray diffraction techniques. Crystallographic investigation shows that heterometallic complexes have one-dimensional coordination polymers. Vibrational assignments are given for all the observed bands and the spectral features also supported to the crystal structures of the polynuclear complexes. The decomposition reaction takes places in the temperature range 30-700 degrees C in the dry air atmosphere.
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    Syntheses and characterizations of two-dimensional heteronuclear tetracyanonickelate(II) complexes with 4-ethylpyridine and investigation of the catalytic activity of [Cd(4epy)2Ni(μ-CN)4]n
    (Taylor & Francis Ltd, 2023) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Kekec, Seray; Unver, Hakan; Sahin, Onur
    Three new 2D heteronuclear tetracyanonickelate(II) complexes with 4-ethylpyridine (4epy), [Cu(4epy)(2)Ni(mu -CN)(4)](n) (1), [Zn(4epy)(2)Ni(mu -CN)(4)](n) (2) and [Cd(4epy)(2)Ni(mu -CN)(4)](n) (3), were synthesized and characterized by vibrational (FT-IR and Raman) spectroscopy, elemental and thermal analyses, single crystal (SC-XRD) and powder X-ray diffraction (PXRD) techniques. The single crystal X-ray analysis reveals that each metal ion (Cu(II), Zn(II), and Cd(II)) is coordinated by two nitrogen atoms from 4epy ligands and four nitrogen atoms from cyanide ligands and Ni(II) ions are coordinated by four carbon atoms from cyanide ligands showing a distorted octahedral and square planar coordination geometries, respectively. The most outstanding features of the complexes are the weak intermolecular C-H & sdot;& sdot;& sdot;Ni interactions between the Ni(II) ion and hydrogen atom of the ethyl group of the 4epy ligand. Adjacent 2D structures are further combined by these C-H & sdot;& sdot;& sdot;Ni interactions, generating a 3D network. The heterogeneous catalytic activity of 3 was investigated for oxidation of some primary and secondary aliphatic or aromatic alcohols; no acid formation was observed in some aromatic alcohols after 24 h and 100% aldehyde selectivity was determined.
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    Syntheses, crystal structures, spectroscopic and thermal properties of 3D heteronuclear coordination polymers with 4-ethylpyridine and cyanide ligands
    (Springer/Plenum Publishers, 2024) Kekec, Seray; Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sahin, Onur
    Three new hexacyanometallate(III) complexes, namely {[Cd-3(4epy)(12)Cr-2(mu-CN)(6)(CN)(6)]center dot 4H(2)O}n (1), {[Cd-3(4epy)(12)Fe-2(mu-CN)(6)(CN)(6)]center dot 4H(2)O}n (2) and {[Cd-3(4epy)(12)Co-2(mu-CN)(6)(CN)(6)]center dot 4H(2)O}n (3), were synthesized by using 4-ethylpyridine (4epy) ligand and characterized by spectral (FT-IR and Raman), crystallographic (SC-XRD and PXRD), thermal and elemental analyses techniques. Single crystal studies have shown that heterometallic complexes 1-3 form 3D polymers. Each M ion [M = Cr(III) in 1, Fe(III) in 2 and Co(III) in 3] is coordinated by six carbon atoms from cyanide ligands and adjacent metal ions are bridged by cyanide ligands to generate [Cd6M6(CN)(12)] clusters. Each Cd(II) ion is coordinated by four nitrogen atoms from 4epy ligands and two nitrogen atoms from cyanide ligands to distorted octahedral coordination geometry. In addition, thermal (TG/DTA) properties of the complexes were investigated. Powder X-ray diffraction (PXRD) patterns of the complexes were recorded to control the phase purities.
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    Synthesis and structural analysis of heteronuclear hexacyanochromate(III) complex with tris(2-aminoethyl)amine), [Cd(tren)(Htren)][Cr(CN)6]•2H2O
    (Elsevier, 2020) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sayin, Elvan; Enonlu, Emir; Sahin, Onur
    The synthesis and structural investigation of a new heteronuclear hexacyanochromate(III) complex based on amine containing tetradentate ligand tris(2-aminoethyl)amine ligand (tren) are reported. The complex was characterized by spectral (FT-IR and Raman), elemental, thermal analysis (TG, DTG and DTA) as well as single crystal X-ray diffraction (SC-XRD) techniques. From elemental and spectral data, the formulae, [Cd(tren)(Htren)][Cr(CN)(6)]center dot 2H(2)O (1), for the metal complex has been proposed. Single crystal X-ray diffraction (SC-XRD) measurement showed that the asymmetric unit of 1 consists of one Cd(II) ion, one Cr(III) ion, six cyanide ligands, one tren and one Htren ligands and two crystal water molecules. The structure of 1 presents one of tren ligands was protonated and the coordinated to Cd(II) ion as a monodentate ligand. Other tren ligand was also bonded to Cd(II) ion as a tetradentate ligand to form a distorted trigonal-bipyramidal geometry. In the crystal structure, Cr(III) ion is coordinated by six carbon atoms from six different cyanide ligands, thus showing a distorted octahedral coordination geometry. In 1, The FT-IR and Raman spectral data of the complex compared with the crystallographic data, the results appear to be consistent with each other. Thermal properties of the title complex were investigated by thermogravimetric analysis (TG/DTG/DTA) in the temperature range of 30-700 degrees C in air atmosphere. (C) 2020 Elsevier B.V. All rights reserved.
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    Synthesis, spectroscopic, structural characterizations, and catalytic properties of cyanide-bridged heteronuclear metal organic frameworks with imidazole
    (Academic Press Inc Elsevier Science, 2022) Mwanza, Telvin; Kurkcuoglu, Gunes Suheyla; Unver, Hakan; Sahin, Onur; Yesilel, Okan Zafer
    Three new cyanide-bridged metal complexes of the general formula [Cu-2(mu-im)(2)(im)(4)M(mu-CN)(4)] n (where M = Ni(II) for 1, Pd(II) for 2, and Pt(II) for 3; im: imidazole) have been synthesized. All 1-3 were investigated using different and properly chosen physicochemical methods: Fourier transform infrared (FT-IR) and Raman spectroscopies (R), thermal analysis (TG, DTG, DTA), powder and single-crystal X-ray diffraction (PXRD and SC-XRD). The polymeric structures of all complexes crystalize in the same triclinic P-1 space group. Brunauer-Emmett-Teller (BET) method was used for the surface area analysis. The average particle size and morphology were estimated by scanning and transmission electron microscope (SEM and TEM). The heterogeneous catalytic activity of complex 2 catalysts was evaluated on the Suzuki-Miyaura reaction between selected aryl halides and phenyboronic acid. Complex 2 exhibits moderate to high heterogeneous catalyst activity for the Suzuki C-C coupling reaction in an organic/water solvent environment.
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    Synthesis, spectroscopic, thermal and structural properties of 4-(2-aminoethyl)pyridinium tetracyanometallate(II) complexes
    (Elsevier, 2017) Karaagac, Dursun; Kurkcuoglu, Gunes Suheyla; Senyel, Mustafa; Sahin, Onur
    In this study, three new complexes (4aepyH)(2)[Ni(CN)(4)] (1), (4aepyH)(2)[Pd(CN)(4)] (2) and (4aepyH)(2)[Pt(CN)(4)] (3) [4aepy = 4-(2-aminoethyl)pyridine] have been synthesized and characterized by elemental, thermal, vibrational (FT-IR and Raman) and single-crystal X-ray diffraction techniques. The crystallographic analyses reveal that the complexes crystallize in the monoclinic system, space group C2/c. The asymmetric units of the complexes contain one M(II) ion, two cyanide ligands and one non coordinated the 4aepy ligand. Each M(II) ion is four coordinated with four cyanide-carbon atoms in a square planar geometry and the [M(CN)(4)](2-) anions act as a counter ion. The 4aepyH cations in the complexes compose of the protonation of the 4aepy. The vibrational spectral data also supported to the crystal structures of the complexes. Thermal stabilities and decomposition products of the complexes were investigated in the temperature range 40-700 degrees C in the static air atmosphere. (C) 2017 Elsevier B.V. All rights reserved.
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    Two-Dimensional Heteronuclear Coordination Polymers Constructed by Cyanide and 3-(2-Aminoethyl)pyridine Ligands
    (Springer, 2021) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sayin, Elvan; Sahin, Onur
    Two new heteronuclear (Ni/Cd and Pd/Cd) 2D coordination polymers formulated as namely {[Cd(mu-3aepy)(2)Ni(mu-CN)(2)(CN)(2)].2H(2)O}(n)(1) and [Cd(3aepy)Pd(mu(4)-CN)(4)](n)(2) (3aepy = 3-(2-aminoethyl)pyridine) were obtained and determined using different techniques (FT-IR and Raman spectroscopies, single crystal X-ray diffraction, elemental, SEM-EDX and thermal analyses). Single crystal X-ray study of the complexes revealed that the Ni(II) and Pd(II) ions are coordinated with four cyanide-carbon atoms in square planar geometries. The Cd(II) ions are bridged by 3aepy ligands to generate [Cd-2(3aepy)(2)](2+)cation and adjacent cations are further linked to cyanide ligands from [Ni(mu-CN)(4)](2-)anion, generating corrugated rectangular grid-like 2D sheets in1. Whereas, the Cd(II) and Pd(II) ions are bridged by cyanide ligands, generating corrugated rectangular grid-like 2D sheets in2. The Cd1 is possessed the distorted octahedral coordination geometry with six nitrogen atoms from two 3aepy and four cyanide ligands. The Cd2 is coordinated by four nitrogen atoms from cyanide ligands to form a square-planar geometry. Furthermore, the most remarkable properties of the complexes are the existence of the intermolecular C-HMIDLINE HORIZONTAL ELLIPSISM interactions between M(II) and hydrogen atoms of the 3aepy ligands (M(II) = Ni and Pd).
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    Unprecedented deca-, penta- and poly-heteronuclear complexes with hexacyanometallates and 2-(hydroxymethyl)pyridine
    (Pergamon-Elsevier Science Ltd, 2021) Sayin, Elvan; Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sahin, Onur
    The reactions of hexacyanometallates (Fe(III) and Co(III)) and 2-(hydroxymethyl)pyridine (hmpy) with ZnCl2 and CdCl2 affords the decanuclear [Cd-6(hmpy)(12)Fe-2(mu-CN)(8)(CN)(4)Fe-2(mu-CN)(4)(CN)(8)] complex (1), the pentanu-clear [Cd-3(hmpy)(6)Co-2(mu-CN)(6)(CN)(6)] cage complex (2) and the 3D framework [Zn(hmpy)(2)Zn-2(hmpy)(2)Co-2(mu-CN)(8)(CN)(4)]n (3). These new cyanide-bridged heteronuclear complexes have been characterised by FT-IR and Raman spectra, together with thermal and elemental analyses. Their structures have been determined by single crystal X-ray diffraction (SC-XRD) and powder X-ray diffraction (PXRD) analyses. In 1, the Cd(II) and Fe(III) centers are arranged alternately at the four corners of a rhombic core, and the cyanide ligands coordinate to the four metal centers of this core in the bridging mode. Adjacent tetranuclear rhombic cores further extend to a decaheteronuclear cluster structure via bridging cyanide ligands. Complex 2 has a pentaheteronuclear cage structure and the neighboring two Co(III) and three Cd(II) centers are bridged by six cyanide ligands. Complex 3 features an unprecedented 3D heterometallic Co(III)-Zn(II) framework based on cyanide ligands.