title: Hexa- and trinuclear organoantimony oxo clusters stabilized by organosilanols.
abstract: Reactions of Ph2SbCl3 with RSi(OH)3 [where R = tert-Bu, cyclo-C6H11] and Ph2Si(OH)2 in toluene in the presence of triethylamine as a base were performed. Single-crystal X-ray structural elucidation of the products revealed the formation of hexanuclear antimony(V) and mixed-valent antimony (III/V) oxo-hydroxo clusters built up of an incomplete cubane subunit. Interestingly, in all the reactions, at least one Sb-C bond cleavage has been observed, leading to the formation of novel cluster assemblies [(Ph2Sb)4(PhSb)2(C4H9SiO3)2(O)6(OH)2] (1), [(Ph2Sb)4(PhSb)2(C6H11SiO3)2(O)6(OH)2] (2), [(Ph2Sb)(PhSb)2(Ph2SiO2)2(O)3(OH)2](-)Et3NH(+) (3), and [(Ph2Sb)4(Sb)2(Ph2SiO2)2(O)6(OH)2] (4), respectively.
authors.affiliation: School of Chemistry, University Of Hyderabad , Hyderabad, 500046, A.P. India.
authors.forename: Pilli V V N
authors.initials: PV
authors.lastname: Kishore
authors.forename: Viswanathan
authors.initials: V
authors.lastname: Baskar
mesh_terms: D000965:Antimony / Q000737:chemistry*; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D012821:Silanes; C082343:silanol; D000965:Antimony