83028-82-4Relevant academic research and scientific papers
Synthesis and Characterisation by Spectroscopy and X-Ray Structure Determination of Palladium Complexes containing the 1-3-η-1,2-Di-t-butyl-3-methyl-4-methylenecyclobutenyl ligand
Ridgwell, Philip J.,Bailey, Pamela M.,Wetherell, Stuart N.,Kelley, Elizabeth A.,Maitlis, Peter M.
, p. 999 - 1004 (1982)
The (1,2-di-t-butyl-3,4-dimethylcyclobutadiene) palladium complex t)2>2Cl4> reacts with base with loss of HCl to give CH2(Me)(But)2>2Cl2> (2).An X-ray crystal structure detemination on the acetylacetonato-derivative CH2(Me)(But)2>(acac)> (3) shows the acetylacetonatopalladium 1-3-η-bonded to a cyclobutenyl ligand bearing an unco-ordinated methylene substituent at C4, t-butyl groups at C1 and C2, and a methyl at C3.N.m.r. ((1)H and (13)C) spectroscopy showed that the ligand in (2) had the same structure.This was also true of the following derivatives that were synthesised: A)2X2> (X = Br, I, or SCN), A)(L)Cl> (L = ButNC, p-ClC6H4NC, p-MeC6H4NH2, PMe2Ph, PMePh2, PPh3, or py), A)L2>+ and A)(S2CNR2)> (R = Et or Pri) = CH2(Me)(But)2>>.
