Effect of a metal ion on intramolecular spin exchange in spin-labeled complexes

Effect of a metal ion on intramolecular spin exchange in spin-labeled complexes Full article

Journal

Russian Chemical Bulletin
ISSN: 1066-5285 , E-ISSN: 1573-9171

Output data

Year: 1999, Volume: 48, Number: 10, Pages: 1982-1986 Pages count : 5 DOI: 10.1007/BF02494758

Tags

noble metals; nitroxyl radicals metal complexes; structure; spin exchange ESR spectra

Authors

Kokorin A.I. ¹ , Evstiferov M.V. ¹ , Grigor'ev I.A. ² , Reznikov V.A. ² , Grampp G. ³

Affiliations

1	N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977, Moscow, Russian Federation
2	N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 9 prosp. Akad. Lavrent'eva, 630090, Novosibirsk, Russian Federation
3	Institute of Physical and Theoretical Chemistry of the Technical University, 12, Rechbauers str., A-8010, Graz, Austria

The characteristic features of intramolecular spin exchange in 14 complexes of Ag-I, Hg-II, Ni-II, Pd-II, Pt-II, Au-III, and Pt-IV with spin-labeled ligands were studied by ESR spectroscopy. The measured values of the exchange integral \J\ and the differences between the enthalpies of the efficient conformations (Delta H) were compared with the electronic polarization (refraction) R-f of the Ni-II, Pd-II, and Pt-II ions and Klopman's rigidity parameters sigma(K), which characterize the total polarazibility of the ions and the degree of covalence of the bond between the metal atom and the donor atom of the ligand, respectively. Delocalization of the electron spin density and the efficiency of spin exchange are determined by the relative contributions of the s, p, and d orbitals. which produce the overlap integral of wave functions, \J\, and by the geometric features of the coordination polyhedron, which affect the mutual orientation of the N-O fragments.

Kokorin A.I. , Evstiferov M.V. , Grigor'ev I.A. , Reznikov V.A. , Grampp G.
Effect of a metal ion on intramolecular spin exchange in spin-labeled complexes
Russian Chemical Bulletin. 1999. V.48. N10. P.1982-1986. DOI: 10.1007/BF02494758 WOS Scopus РИНЦ OpenAlex

Published print:

Oct 1, 1999

Web of science:	WOS:000084379200029
Scopus:	2-s2.0-0033235220
Elibrary:	13327727
OpenAlex:	W2000005386

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