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|Title:||X-Ray K-Absorption Spectral Investigations of Some Cobalt(II) Complexes with Triphenylphosphine & Triphenylphosphine Oxide|
|Authors:||Awasthi, P K|
Srivastava, B D
|Abstract:||X-ray K-absorption spectra of some structurally important, paramagnetic cobalt(II)-triphenylphosphine oxide and cobalt(II)-triphenylphosphine complexes.having tetrahedral geometry, have been studied. The edge and peak shifts for triphenylphosphine oxide complexes are greater than those for triphenylphosphine- complexes. The observed edge shifts have been discussed in terms of σ-donor and π-acceptor properties of the ligands. The tripehnylphosphine complexes show a small pre-edge peak on the low energy side of the main K-edge, which is assigned to 1s + 3d (quadrupole) transition. The main peaks of all these complexes are narrow and sharp which may be due to the transition of K-electrons into high density of normally unoccupied states with p-symmetry in the neighbourhood of cobalt atom. The average metal-ligand bond distances have also been calculated from the extended fine structure measurements.|
|Appears in Collections:||IJC-A Vol.28A(04) [April 1989]|
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