A family of three-dimensional porous coordination polymers with general formula (Kat)2[{M(H2O)n}3{Re6Q8(CN)6}2]·xH2O (Q=S, Se; n=1.5, 2) |
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| Authors: | N.G. Naumov A.V. Virovets D.Yu. Naumov V.E. Fedorov |
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| Affiliation: | a Laboratory of Chemistry of Superconductors, Russian Academy of Sciences, Nikolaev Institute of Inorganic Chemistry, SB RAS, Siberian Branch 3, Ak. Lavrentiev Avenue, Novosibirsk 630090, Russiab Department of Chemistry, University of Duhram, Duhram, UK |
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| Abstract: | The X-ray crystal structures of a series of new compounds (H3O)2[{Mn(H2O)1.5}3{Re6Se8(CN)6}2]·19H2O (1), (Me4N)2[{Co(H2O)1.5}3{Re6S8(CN)6}2]·13H2O (2), (Me4N)2[{Co(H2O)1.5}3{Re6Se8(CN)6}2]·3H2O (3), (Et4N)2[{Mn(H2O)2}3{Re6Se8(CN)6}2]·6.5H2O (4), (Et4N)2[{Ni(H2O)2}3{Re6S8(CN)6}2]·6.5H2O (5), and (Et4N)2[{Co(H2O)2}3{Re6S8(CN)6}2]·10H2O (6) are reported. All six compounds are isostructural crystallizing in cubic  space group with four formulae per unit cell. For compounds 1, 3-5 the following parameters were found: (1) a=19.857(2) Å, R1=0.0283; (3 at 150 K) a=19.634(1) Å, R1=0.0572; (4) a=20.060(2) Å, R1=0.0288; (5) a=19.697(2) Å, R1=0.0224. The structures consist three-dimensional cyano-bridged framework formed by cyano cluster anions [Re6Q8(CN)6]4−, Q=S, Se and transition metal cations, M2+=Mn2+, Co2+, Ni2+. Water molecules and large organic cations Me4N+ and Et4N+ are included in cavities of this framework. Porosity of the framework, its ability to accommodate different cations and water molecules by little changes in the structure, as well as distortion of coordination framework under loss of water of crystallization is discussed. |
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| Keywords: | Rhenium Octahedral cluster Cyanide Coordination framework Transition metals |
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