BIS(SULFURDIIMIDO)TIN AND TRIS(SULFURDIIMIDO)SILICON, -GERMANIUM AND -TIN COMPOUNDS—STRUCTURE IN SOLUTION AND IN THE SOLID STATE AS DETERMINED BY MULTINUCLEAR MAGNETIC RESONANCE

Abstract

Bis(sulfurdiimido)tin (1a-5a, 3b, 4b) and tris(sulfurdiimido)element compounds (element = Si, Ge, Sn; 6a, 7a,b-9a,b) were prepared and studied by multinuclear magnetic resonance in solution (¹H, ¹³C, ¹⁵N, ²⁹Si, ¹¹⁹Sn NMR) and in the solid state (¹³C, ¹⁵N, ¹¹⁹Sn CP/MAS NMR). All compounds are fluxional molecules in solution with respect to fast E/Z = Z/E isomerization. In the case of N-tert-butyl derivatives; the configuration of the respective isomers could be assigned by low temperature NMR measurements. For example, in the case of ¹Bu₂Sn(NSN′Bu)₂, 4a, two configurational isomers are present in solution, but only one in the solid state. In the case of the tin compounds, all NMR data point towards association both in solution (at low temperature) and in the solid state, the tendency for association being greatest for n-butyl-tris(N-tert-butylsulfurdiimido)tin (6a).

Key Words:

• Sulfur diimides
• organometallic-substituted
• organosilicon compounds
• organogermanium compounds
• organotin compounds
• NMR
• multinuclear
• NMR
• solid-state
• CP/MAS