Discrete Spirobicyclic Silicate Anions with SiO₂N₂C, SiN₂S₂C and SiO₄C Frameworks

Abstract

Bis(2-aminobenzoato)phenylsilicate (1), bis(2-aminothiophenoxy)phenylsilicate (2), and bis(2-hydroxybenzoato) phenylsilicate (3) anions were obtained as their triethylammonium salts from the reactions of phenylsilane with appropriate ligands in the presence of triethylamine. The compounds were characterized by IR, multinuclear ( 1 H, 13 C, and 29 Si) NMR, and FAB mass spectral data. Th X-ray crystal structure of 1.CH 2 Cl 2 revealed slightly distorted trigonal bipyramidal geometry around silicon. The spirobicyclic silicate anions are the first examples with silicon-heteroatom linkages having six-membered (1) and five-membered (2) rings on silicon.

Novel hexacoordinate organosilicon(IV) complexes of diethylenetriamine Schiff base with SiO2N3 skeleton

“…Therefore, the reported work may be of interest for some researchers. In continuation with our previous studies on hypercoordinate silicon compounds [16][17][18] , we aimed at the synthesis and characterization of novel neutral hexacoordinate silicon(IV) complexes with pentadentate ligand, N,N'-diethylenetriamine-bis(salicylideneimine) derived from salicylaldehyde and diethylenetriamine (Scheme 1). The resulting compounds contain SiO 2 N 3 skeleton.…”

Synthesis, Characterization and Antifungal Studies of Organosilicon (IV) Complexes Derived From Mixed Azines

“…A survey of literature reveals that the present stage of knowledge about the organosilicon complexes of mixed azines containing N, O donor system is rather scanty. So in continuation with our previous studies on hyper-coordinate silicon (IV) compounds [9][10][11][12][13][14][15][16][17][18][19][20][21][22] we considered it worthwhile to synthesize and characterize novel neutral hexa-coordinated silicon (IV) complexes with mixed azine ligands. DMSO solution of complexes were studied for their antifungal activity against Candida albicans used as model organism.…”