Journal
ZEITSCHRIFT FUR KRISTALLOGRAPHIE-CRYSTALLINE MATERIALS
Volume 228, Issue 11, Pages 565-569Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1524/zkri.2013.1647
Keywords
Closo-decaborate; Copper(I); Positional isomers
Categories
Funding
- RFBR [12-03-33107]
- Council of the President of the Russian Federation [MK-5181.2013.3, MK-1728.2013.3]
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Interaction of dicopper(I)-decaborate Cu2B10H10 with tetraphenylphosphonium decaborate ((C6H5)(4)P)(2)(B10H10) afforded the title compound, Ph4P[Cu(B10H10)]. The compound has been characterized using elemental analysis, FTIR spectroscopy and X-ray crystallography. The asymmetric unit contains one-fourth of a Cu-I cation, one-fourth of a tetraphenylphosphonium cation and one-fourth of a decaborate dianion. The copper and phosphorus atoms are located on a four-fold rotation and a four-fold rotation-inversion axes, respectively. The dianion is disordered over four sites by a four-fold rotation axis and a glide plane. Decahydro-closo-decaborate dianion B10H102- acts as a bridge ligand through equatorial vertices. Each Cu-I centre coordinates two decaborate anions through 3c2e (CuHB) bonds to give a one-dimensional {[CuB10H10](-)}(n) chain Although a number of compounds with the {Cat[CuB10H10]}(n) composition (where Cat is any cation) and chain {[CuB10H10](-)}(n) anions are known, this coordination mode for borates has not been observed earlier. The ability of the decaborate dianion to act as a bridge ligand through various vertices and edges allows {[CuB10H10](-)}(n) anions to form a number of positional isomers. Relation between the coordination mode of closo-decaborate, the nature of cation and spatial features of polymer chain {[CuB10H10](-)}(n) in the structures of {Cat[CuB10H10]}(n) (where Cat = Cs+, Cu+, (CH3)(2)NH2+, (C2H5)(3)NH+ or Ph4P+) is discussed.
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