Articles written in Journal of Chemical Sciences
Volume 114 Issue 4 August 2002 pp 347-356
Cu(I) complexes of formula Cu(PPh3)2LClO4 [L = 2 or 3 pyridine carboxaldehyde] are synthesised and characterised to explore the coordination of an aldehyde, a hard and neutral oxygen donor to a soft Cu(I) centre. The structural and spectroscopic results illustrate that only in 2-pyridinecarboxaldehyde, the ‘C=O’ group coordinates to soft Cu(I) centres due to a favourable chelate effect, while in 3-pyridinecarboxaldehyde, it remains uncoordinated. Upon chelation via N and O donors, 2-pyridinecarboxaldehyde resembles bipyridine or phenanthroline in terms of its bite angle and spectroscopic features. Such chelation can be easily challenged with coordinating anions like bromide, or more basic pyridines. A drastic change in the MLCT absorption signals the decomplexation of the ‘C=O’ group. The observed results point out that the Cu(I) centre can readily exchange the hard ‘O’ donor for softer ligands.
Volume 115 Issue 5-6 October 2003 pp 741-749
Rhodium(I) complexes of the hybrid ylide-phosphine ligands, Ph2P(CH2)
Volume 132, 2020
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