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Bis(1,4,7-trithia-cyclo-nona-ne)nickel(II) bis-(tetra-fluorido-borate) nitro-methane disolvate
Abstract:
The homoleptic thio-ether title complex, [Ni(C(6)H(12)S(3))(2)](BF(4))(2)·2CH(3)NO(2), shows the expeced hexa-kis-(thio-ether) octa-hedral environment around the Ni(II) atom. It crystallized as two crystallographically independent complex cations, [Ni(9S3)(2)](2+) (9S3 = 1,4,7-trithia-cyclo-nona-ne), within the unit cell where each Ni(II) lies on an inversion center. In addition to the complex cations, there are two crystallographically independent BF(4) (-) anions present to balance the charge, and each shows disorder along a pseudo-C(3) axis with ratios of 0.53 (2):0.47 (2) and 0.55 (2):0.45 (2). Two nitro-methane solvent mol-ecules per complex cation are also present in the unit cell.
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Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...