The formation of the spherical self-assembly of gold nanoparticles (AuNPs) of 200 ± 20 nm size at the water–chloroform interface is achieved by employing the cyclotetrasiloxane [RSCH2CH2SiMeO]4 (R = CH2CH2OH) as the stabilizing ligand. The interfacially stabilized AuNPs act as a versatile catalyst for selective hydrolytic oxidation of only one of the Si–H bonds in secondary organosilanes, RR1SiH2 (R
Novel pentacoordinate silicon compounds bearing [Si-N-C-N-C-N] chelate ring derived from biguanide ligands
作者:Pooja Kumar、Ravi Shankar
DOI:10.1016/j.jorganchem.2003.08.022
日期:2003.12
4-bis(silyl)-5-propyl/phenylbiguanides with the general formula (R1R22SiCH2CH2SiMeH)2·H4bigR, [R1=Ph, R2=Me, R=nPr (4), R=Ph (5); R1=Me, R2=Ph, R=nPr (6), R1=R2=Et, R=Ph (7)]. These compounds represent a new family of pentacoordinatesilicon derivatives comprising of [Si-N-C-N-C-N] chelate ring and have been characterized by elemental analysis, FAB mass, IR and multinuclear (1H, 13C and 29Si) NMR spectral studies