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Electronic structures of square planar cobalt(II), nickel(II) and copper(II) complexes with some N4-macrocyclic ligands [1]

✍ Scribed by Y. Nishida; K. Hayashida; A. Sumita; S. Kida

Publisher
Elsevier Science
Year
1978
Tongue
English
Weight
443 KB
Volume
31
Category
Article
ISSN
0020-1693

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✦ Synopsis

ESR and absorption spectra were measured for the square planar cobalt(II), nickel(II) and copper complexes with some I4, 15 and 16membered N4macrocyclic ligands, such as (14-a), H(14-b), H,(14c), HJIS-c) and H,(16-c) (for the abbreviations, see Fig. 2 in the text). On the basis of the ESR spectra of the cobalt(II) complexes, the splitting schemes for the cobalt d-orbitals were grouped into two types, (I) [Co(l4-a)] '+ and [Co(Il-b)] + where no or little Ir-antibonding interaction is present and (2) [Co(I4c)], [Co(lS-c)] and [Co(l6-c)] where a considerable n-antibonding interaction is present. The electronic spectra of the cobalt(II), nickel(II) and copper complexes were reasonably interpreted in terms of the model proposed.

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