X-Ray analysis of 1-phospha-1,2,3-butatriene as a ligand of carbonyltungsten complex

Metal carbonyl complexes of phosphaamidines. Coordinative integrity detected in C-amino(λ3,σ2)-phosphaalkene isomers coordinated through n(P) HOMO−1 donor orbitals

“…1,3-azaphosphaallyls of Mg, Ca, Sr, Ba, Li and Sn have been prepared by silyl migration (the N and P substituents are thereby always a TMS group). 11,12 This recent work follows on a more extensive exploration by many workers on metal complexes of tri-substituted analogues which lack an ionisable H atom and hence tend to be prepared exclusively in one tautomeric form, [13][14][15][16][17][18] including conventional phosphaalkenes, [19][20][21][22][23][24][25][26][27][28][29][30][31] phosphacumulenes, [32][33][34][35][36][37][38][39][40] alkoxy-("Becker") phosphaalkenes R′PC(R)OR″, [41][42][43][44] aminophosphaalkenes R′PC(R)NR″ 2 (ref. [45][46][47][48] and diaminophosphaalkenes R′PC(NR″ 2 ) 2 .…”

Heavy Allenes and Cumulenes ECE‘ and ECCE‘ (E = P, As, Si, Ge, Sn; E‘ = C, N, P, As, O, S)

“…39/40 has also been largely used as precursor of 1-phosphabutatrienes (see section X). 44,49,50 Owing to the good leaving-group property of the phenylethynyl substituent, the phosphaallene 50 has been obtained by addition of t-BuLi to the corresponding bis(phenylethynyl)phosphine 49 19,51 (eq 13).…”

“…ArPdCdCdCPh 2 reacts with W(CO) 5 ‚THF to give the η 1 -complex 200 49 (Scheme 39). The overall conformation of the ligand phosphabutatriene in the complex is quite similar to that of free ligand with no appreciable change in the corresponding bond lengths and angles of the PdCdCdC frame: PdC, 1.664( 6…”