119Sn, 15N, 13C, and 1H NMR Study of the Intramolecular Sn-N Donor-Acceptor Interaction in [2-(Dimethylaminomethyl)phenyl]stannanes

Abstract

119 Sn, 15 N, 13 C, and 1 H NMR spectra were studied for [2-(dimethylaminomethyl)phenyl]stannanes, R 1 R 2 R 3 R 4 Sn or R 1 R 2 R 2 4 Sn, where R 1 , R 2 , and R 3 are 1-butyl, Cl or Br, the same or different, and R 4 is 2-(dimethylaminomethyl)phenyl. The occurrence of intramolecular interaction between the nitrogen and tin atoms was demonstrated based on changes in the characteristic values of the NMR parameters of these nuclides (δ( 15 N), δ( 119 Sn), J ( 119 Sn, 15 N), and their interrelations, as well as on the relatively high values of the coupling constants 3 J ( 119 Sn, 13 C(CH 2 )).