Macrocyclic polyphosphane ligands. Cobalt(II) and nickel(II) complexes of 5RS,8RS,16RS,19RS-tetraphenyl-5,8,16,19-tetraphospha-1,12-dithiacyclodocosane (δ-L1) and the crystal structure of [Co(δ-L1)][BF4]2·0.5H2O
- 1 January 1985
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 6,p. 1179-1182
- https://doi.org/10.1039/dt9850001179
Abstract
The chiral configuration of the title ligand, δ-L1, has been established by the X-ray crystal structure determination of its cobalt complex [Co(δ-L1)][BF4]2·0.5H2O. The compound crystallises in the orthorhombic space group Fddd, with a= 31.424(6), b= 24.633(5), c= 22.223(5)Å, and Z= 16. Least-squares refinement gave R= 0.080 for 1 695 observed reflections. The cobalt atom is low-spin and octahedrally co-ordinated by the macrocycle which adopts meridional configurations for the P(CH2)3S(CH2)3P moieties. The stereochemistry of some cobalt(II) and nickel(II) complexes of δ-L1 with 1 : 1, 2 : 1, and 3 : 2 metal-to-ligand ratios is discussed.Keywords
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