75504-46-0Relevant academic research and scientific papers
Platinacyclopentene Formation via δ-Hydrogen Abstraction
Chappel, S. David,Cole-Hamilton, David J.
, p. 238 - 239 (1980)
Refluxing Pt(PEt3)2(o-CH2C6H4Me)2 in xylene affords a five-membered ring compound via δ-hydrogen abstraction.
δ-Hydrogen Abstraction from Alkyl and Phosphine Ligands Co-ordinated to Platinum(II); Formation of Benzoplatinacyclopentene Complexes
Chappell, S. David,Cole-Hamilton, David J.
, p. 1051 - 1058 (2007/10/02)
Reactions of (cod = cyclo-octa-1,5-diene) with Mg(CH2C6H4Me-o)Br and tertiary phosphines (PR3) afford cis- (R = Et or Ph), which on refluxing in xylene give the benzoplatinacyclopentene complexes via δ-hydrogen abstraction reactions.Using PPh2(C6H4Me-o), metallation of the phosphine is preferred and the first obtained product after refluxing in xylene is >.On further refluxing in xylene, this compound again eliminates o-xylene to give the known .Using P(C6H4Me-o)3, the bulkiness of the phosphine makes alkylation unfavourable and the fluxional Br> is obtained.The variable-temperature n.m.r. spectra of this compound are interpreted in terms of hindered rotation around the Pt-P and P-C bonds giving rise to two different conformers at low temperature, each with all methyl groups non-equivalent.The compounds have been identified by their spectroscopic properties and some of their reaction chemistry is discussed.
