α,ω-Bis(trichlorostannyl)alkanes:  Unravelling the Hydrolysis Pathway to Organotin-oxo Oligomers

Abstract

New α,ω-bis(trichlorostannyl)alkanes, Cl 3 Sn(CH 2 ) n SnCl 3 [ n = 3−5, 8], have been synthesized via tin−phenyl bond cleavage reactions on α,ω-bis(triphenylstannyl)alkanes, Ph 3 Sn(CH 2 ) n SnPh 3 [ n = 3−5, 8], using either SnCl 4 or concentrated hydrochloric acid. Some key missing links, (H 2 O)Cl 3 Sn(CH 2 ) 3 SnCl 3 (H 2 O) ( 1a ) and (H 2 O) 2 Cl 3 Sn(CH 2 ) 3 SnCl 3 (H 2 O) 2 ( 6 ), in the hydrolysis pathway of organotin trichlorides were identified. Crystal structures of the nonassociated di-tin compounds (H 2 O)Cl 3 Sn(CH 2 ) 3 SnCl 3 (H 2 O) ( 1a ) and (H 2 O) 2 Cl 3 Sn(CH 2 ) 3 SnCl 3 (H 2 O) 2 ( 6, isolated as the 18-crown-6 cocrystal acetonitrile solvate) as well as the polymeric hydrolysis product [H 2 O(OH)Cl 2 Sn(CH 2 ) 3 SnCl 2 (OH)H 2 O·2H 2 O] n ( 7 ·2H 2 O) are reported.