The synthesis of cis-dichloro(tri-n-butylphosphine)(bis(N,N-dimethylamino)-cyclopropenyli dene)palladium(II), cis-PdCl2[C(Me2NC)2](P-n-Bu3 ), from the reaction of [PdCl2(C(Me2NC)2)]2 with P-n-Bu3 is described. The first precise analysis of the structure of a cyclopropenylidene-transition metal complex has been carried out. The C3-ring is bound through the unique carbon atom to the metal center with a PdC distance of 1.961(3)Å and is roughly perpendicular to the metal square plane. All CC ring distances are equivalent within experimental error and average 1.383(2)Å. The dimethylamino groups are sp2 hybridized at the nitrogen atoms and are coplanar with the carbbocyclic fragment. The compound crystallizes in the monoclinic space group C52h-P21/c with four molecules in a cell of dimensions a 7.933(4), b 15.524(6), c 19.572(7)Å, β 101.05(2)°, V 2326Å3 (T-160°C). The final values of R and Rw for the 226 variables and 4383 significant observations are 0.036 and 0.042. Characteristic spectroscopic (IR and NMR) data for the compound are reported.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry