8-Methylaminoquinolinium Salts of Tetrachlorodimethylstannate(IV) and Tetrachlorodiphenylstannate(IV)

Abstract

The title compounds, (C10H11N2)2[SnCl4(CH3)2] and (C10H11N2)2[SnCl4(C6H5)2], have been prepared from the reaction of 8-methylaminoquinoline with diorganotin dichlorides. In the methyl compound, the Sn atom is coordinated to two methyl groups, which are trans with respect to each other [Sn—C 2.102 (5) and 2.103 (4) A], and to four Cl atoms [Sn—Cl 2.442 (1), 2.461 (1), 2.894 (1) and 3.098 (1) A]. The two long Sn—Cl bonds are trans to the short ones and their Cl atoms are hydrogen bonded to the N—H groups of the 8-methylaminoquinolinium cations. The Sn—CH3 bonds are bent away from the short Sn—Cl bonds so that the CH3—Sn—CH3 angle is 155.7 (2)°. A correlation between the C—Sn—C angle and the Sn—Cl bond lengths was observed. The anion of the phenyl compound is close to being octahedral and has exact twofold symmetry; the phenyl groups are trans with respect to each other [Sn—C 2.143 (2) A] and Sn—Cl distances are in the range 2.497 (1)–2.672 (1) A. Two Cl atoms are hydrogen bonded to N—H groups of the cations.