Reactions of molybdenum and tungsten hydrazido (2-) complexes with alkenes

Taylor, SA, 1982. Reactions of molybdenum and tungsten hydrazido (2-) complexes with alkenes. PhD, Nottingham Trent University.

Preview

Text 10183393.pdf - Published version Download (40MB) | Preview

Abstract

The reactions between cyanoalkenes and dinitrogen derived hydrazido(2-) complexes of molybdenum and tungsten were investigated. Two types of reaction were observed, either the formation of vinyl-diazenido(1-) complexes or a reaction with loss of the hydrazido(2-) ligand and formation of nitrile-derived methyleneamino complexes. A single crystal-X-ray study has characterised the bromotricyanoprop-2-enylideneamino ligand. The kinetics and mechanism of the former reaction have been investigated.

Protonation of the vinyldiazenido(1-) complexes with HBF4 in thf produced vinylhydrazido(2-) complexes, which were reduced electrochemically via a four electron reduction to give aminocyanopyrazoles and the starting hydrazido(2-) complex. A cyclic process for the formation of aminocyanopyrazole is described.

The reaction between the hydrazido(2-) complex and alkenes activated by either palladium or mercury salts was investigated, and attempted intramolecular cyclisation reactions to form heterocyclic ring structures on the terminal nitrogen atom of alkenylhydrazido(2-) complexes are described. The reaction between the hydrazido(2-) complex and alkenes in strong acid solution was also briefly investigated.

Item Type:	Thesis
Creators:	Taylor, S.A.
Date:	1982
ISBN:	9781369315981
Identifiers:	Number Type PQ10183393 Other
Divisions:	Schools > School of Science and Technology
Record created by:	Linda Sullivan
Date Added:	24 Sep 2020 13:37
Last Modified:	16 Aug 2023 10:52
URI:	https://irep.ntu.ac.uk/id/eprint/40909

Actions (login required)

Edit View

Statistics

Views

Downloads