1471145-34-2

Upstream product

• 653-37-2 perfluorobenzaldehyde 
• 88-05-1 2,4,6-trimethylaniline 
• 56222-36-7 N,N'-bis(2,4,6-trimethylphenyl)ethanediimine 
• 1471145-27-3 2,3-bis(mesitylamino)acrylonitrile 
• 1471145-30-8 2,3-bis(mesitylimino)propionitrile 

Relevant academic research and scientific papers

Rhodium(I) and silver(I) complexes of 4,5-Dicyano-1,3-dimesityl- and 4,5-dicyano-1, 3-dineopentylimidazol-2-ylidene

The new N-heterocyclic carbene (NHC) precursors 4, -dicyano-1, -dimesityl- (9) and 4, 5-dicyano-1, 3-dineopentyl-2-(pentafluorophenyl)imidazoline (14) were synthesized. The structure of 9 could be determined by X-ray crystallography. With the 2-pentafluorophenyl-substituted imidazolines 9 and 14, the [AgCl(NHC)], [RhCl(COD)(NHC)], and [RhCl(CO)2(NHC)] complexes [NHC = 4, 5-dicyano-1, 3-dimesitylimidazol-2-ylidene (3) and 4, 5-dicyano-1, 3-dineopentylimidazol-2-ylidene (4)] were obtained. Crystal structures of [AgCl(3)] (15), [RhCl(COD)(3)] (17), [RhCl(COD)(4)] (18), and [RhCl(CO) 2(3)] (19) were solved and with the crystal data of 19, the percent buried volume (%Vbur) of 31.8(±0.1) % was determined for NHC 3. Infrared spectra of the imidazolines 9 and 14 and of the complexes 15-20 were recorded and the CO stretching frequencies of complexes 19 and 20 were used to determine the Tolman electronic parameters of the newly obtained NHCs 3 (TEP: 2060 cm-1) and 4 (TEP: 2061 cm-1), thus proving that 1, 3-substitution of maleonitrile-NHCs does not have a significant effect for the high π-acceptor strength of these carbenes. Copyright