1-[N-(2-aminoethyl)aminoalkyl]silatranes, NH2(CH2)2NH(CH2)n (I, n = 1; III, n = 3) and their paramagnetic complexes with CuCl2 (2 : 1) (III) and IV) have ben synthesized. Relevant 1H and 13C NMR data reveal, that the molecule I in the series of silatranes has the weakest transannular Si ← N bond. The pattern of the signals and the value of the g-factor in the ESR spectra of complexes III and IV in the crystaline state