Phosphaalkenes cumulenes

Phenylmethylsilanediol, synthesis, 42 155 Phenylsilanetriol, monosodium salts, 42 169 4 -Phenyl-2,2 6, 2 -terpyridine bis nickel complex, 30 74 molecular structure, 30 74 PhjtfluorenyllSiOH, 42 197 (Ph(Me2N)C-=Nli], 37 59-65 orientation of imino ligand, 37 61-63 (PhMe SiljCSiH OH, 42 244-245, 248 (PhMe SiljCsiMeHlOH), 42 191 Phosphaalkenes acyclic, 33 338-353 butadienes, 33 346-349 cumulenes, 33 352... 

Phosphaalkenes display a number of unusual properties. An investigation of phosphaalkenes with several aryl substituents, revealed that bis(diphosphene) 19 forms a triplet dianion211. A cumulene structure was demonstrated for the Ar-P = C=C=P-Ar radical anion. The unpaired electron is predominately localized on the P atoms212. 

Binuclear cumulenes, synthesis, 230 Bis(methylene)propenylphosphorane, synthesis with phosphaalkenes, 19 [ ( -BuSe)Fe2(CO)6h(/i4-Se)], synthesis and structure, 275, 276 Butene 1,4-diones, synthesis, 224... 

Gomprehensive reviews of the chemistry of heavy allenes and cumulenes, heteroaldehyde, heteroketone, phosphaalkene " " and 77 -ketenyl (77 -G(PPh3)=GO) " complexes, which include platinum complexes, have been published. A review of transition metal complexes of arynes, strained cyclic alkynes, and strained cyclic cumulenes also includes information relative to this section. " ... 

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