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Mass spectrometry of transition metal π-complexes. 40—(η4-Norbornadiene)-(η5-cyclopentadienyl)rhodium derivatives

✍ Scribed by D. V. Zagorevskii; Hongwen Chen; J. L. Holmes; Yu. S. Nekrasov; I. T. Chizhevski; N. V. Rastova; N. E. Kolobova

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
564 KB
Volume
28
Category
Article
ISSN
1076-5174

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✦ Synopsis

Electron impact mass spectra of substituted norbornadienecyclopentadieny~h~um complexes have been studied.

The decompositions of molecular ions are (i) metal-ligand bond rupture, (ii) norbornadiene skeleton destruction, (iii) substituent or hydrogen atom elimination from the norbornadiene moiety and (iv) radical or neutral molecule elimination from the substituent(s) on the diene ligand. Norbornadiene ligand loss occurs more easily than loss of the cyclopentadienyl ring. Elimination of C,H,R and C,H, from the diene ligand leads to the formation of rhadocenium or its corresponding substituted derivatives. It is proposed that bridging C-C bond rupture followed by migration of the endo-H atom around the six-membered ring precedes the loss of the substituent. Some decomposition pathways of the norbornadiene ligand are explained in terms of specific interaction between the metal atom and substituent.

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## Arene Complexes of Transition Metals in Reactions with Nucleophilic Reagents. Part 27. Synthesis and Properties of (η 6 -Benzene) (η 5 -1ethyl-2,3,4-trimethylcyclopentadienyl) Complexes of Rhodium(III). -Two novel ethyl(trimethyl)cyclopentadienylrhodium complexes [(η 6 -C 6 H 6 )Rh (η 5 -EtMe