X-ray diffraction studies of two azametallatranes. Peculiarities of structures of N,N0,N00-tris(trimethylsilyl)azametallatranes using DFT calculations

Single crystal structures of N(CH2CH2NSiMe3)3Si-Vinyl (1) and N(CH2CH2NSiMe3)3Si-n-Butyl (2) were determined by X-ray diffraction studies: both compounds show weak transannular Nax ! M interactions (1, d(Nax ! Si) ¼ 2.712(1) A ° , 2, d(Nax ! Ge) ¼ 2.743(3) A ° ). General trends for molecular structures of the group 14 elements (Si, Ge, Sn) azametallatranes are discussed with also included DFT calculations data. q 2004 Elsevier B.V. All rights reserved.