Please use this identifier to cite or link to this item:
|Title:||Macrocyclic Polyphosphane Ligands - Cobalt(ii) and Nickel(ii) Complexes of the Gamma-diastereoisomers and Epsilon-diastereoisomers of 4,7,13,16-tetraphenyl-4,7,13,16-tetraphospha-1,10-dithiacyclo-octadecane (l1) and the Crystal-structure of [co(epsilon-l1)][bph4]2.etoh||Authors:||M., Ciampolini
P. L., Orioli
|Keywords:||X-ray; macrocycle; complex||Issue Date:||1985||Project:||None||Journal:||JOURNAL OF THE CHEMICAL SOCIETY DALTON TRANSACTIONS||Abstract:||
The chiral configuration of the title diastereoisomer, Îµ-L1, has been ascertained by the X-ray crystal-structure determination of its cobalt(II) complex [Co(Îµ-L1)][BPh4]2·EtOH. The complex crystallises in the monoclinic space group P21/c, with a= 14.590(3), b= 13.004(3), c= 40.972(9)Å, β= 91.80(4)°, and Z= 4. Least-squares refinement gave R= 0.114 for 1 241 observed reflections. The cobalt atom is six-co-ordinated by two sulphur and four phosphorus atoms of the macrocycle forming a distorted cis-octahedral geometry. The nickel complexes are attributed a similar stereochemistry on the basis of their electronic spectra. The stereochemistry of the cobalt and nickel complexes of γ-L1 has been investigated by electronic spectroscopy. The γ-L1 isomer behaves as a quadridentate tetraphosphane ligand, the two sulphur atoms being unco-ordinated.
|Appears in Collections:||Publications|
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.