Collect. Czech. Chem. Commun. 1998, 63, 977-989

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

Aleš Růžičkaa, Vladimír Pejchalb, Jaroslav Holečeka, Antonín Lyčkab and Klaus Jacobc

a Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, 532 10 Pardubice, Czech Republic
b Research Institute of Organic Syntheses, 532 18 Pardubice-Rybitví, Czech Republic
c Institute of Inorganic Chemistry, Department of Chemistry (Merseburg), Martin Luther University, Halle-Wittenberg, 06099 Halle, Germany


119Sn, 15N, 13C, and 1H NMR spectra were studied for [2-(dimethylaminomethyl)phenyl]stannanes, R1R2R3R4Sn or R1R2R24Sn, where R1, R2, and R3 are 1-butyl, Cl or Br, the same or different, and R4 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(15N), δ(119Sn), J(119Sn,15N), and their interrelations, as well as on the relatively high values of the coupling constants 3J(119Sn,13C(CH2)).

Keywords: Stannanes; Tin; Organotin(IV) compounds; [2-(dimethylaminomethyl)phenyl]stannanes; 119Sn, 15N,13C, and 1H NMR spectroscopy; J(119Sn,15N); Tin-amine interaction.