Premium
Organotantalum Phosphaketene and Phosphaazaallene Complexes
Author(s) -
Grundmann Anne,
Sárosi Menyhárt B.,
Lönnecke Peter,
HeyHawkins Evamarie
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402400
Subject(s) - chemistry , tantalum , isocyanide , derivative (finance) , carbon monoxide , stereochemistry , crystallography , medicinal chemistry , catalysis , organic chemistry , financial economics , economics
The first tantalum phosphaketene and phosphaazaallene complexes [Cp*Ta{1,2‐(NSiMe 3 ) 2 C 6 H 4 }{P(R)CX}] {Cp* = C 5 Me 5 ; X = O; R = cyclohexyl (Cy, 3 ), i Pr ( 4 ); X = NCy, R = Cy ( 5 ), i Pr ( 6 )} were obtained by insertion of carbon monoxide or cyclohexyl isocyanide into the Ta–P bond of cyclohexyl‐ and (isopropylphosphanylidene)tantalum(V) complexes, [Cp*Ta{1,2‐(NSiMe 3 ) 2 C 6 H 4 }(PR)] {R = Cy ( 1 ), i Pr ( 2 )}. Phosphaazaallene complexes 5 and 6 occur as E and Z isomers. These isomers have different electronic structures according to NMR spectroscopic studies and DFT calculation. Both isomers of the cyclohexylphosphanyl derivative (i.e., 5a and 5b ) and one isomer of the isopropylphosphanyl derivative (i.e., 6b ) could be structurally characterized by X‐ray crystallography.