The crystal and molecular structure of μ-tras-hexacyanobutenediido-bis[(carbonyl)bis(triphenylphosphine)rhodium], [Rh- (CO) [P(C6H5)3]2]2 (HCBD) [HCBD = trans-1,1,2,3,4,4-hexacyanobutenediide] has been determined from three-dimensional X-ray diffraction data. The compound crystallizes with two molecules in space group Ci1-P1 of the triclinic system in a cell of dimensions a = 16.483 (2), b = 18.580 (3), c = 12.813 (2) Å; α = 105.02 (1), β = 103.83 (1), γ = 82.26 (1)°. The structure was refined by least-squares techniques to a conventional R index on F of 0.058 based on 7028 reflections above background. The structure determination shows that the HCBD dianion is attached to the Rh atoms through Rh-N bonds forming a binuclear keteniminato complex. The geometry about the rhodium atoms is square planar with the phosphorus atoms trans to each other. Comparisons are made between the structural parameters of the bridging ligand trans-HCBD and those of K2(cis-HCBD).
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry