Zur Chemie des Galliums, IV. Darstellung und Strukturen monomerer (2,2,6,6‐Tetramethylpiperidino)gallane

Abstract
On the Chemistry of Gallium Compounds, IV. ‐ Synthesis and Structure of Monomeric (2,2,6,6‐Tetramethylpiperidino)‐gallanesMonomeric dimethyl‐ and diethyl(2,2,6,6‐tetramethylpiperidino) gallanes have been synthesized and spectroscopically characterized. Starting from bis(2,2,6,6‐tetramethylpiperidino)gallium halides (tmp)2GaX (16, 17, X=Cl, Br) various (aryloxy)‐ and organylbis (amido) gallium compounds (tmp)2GaY (18–21, Y = OAr, Ph, Me) have been obtained. The crystal structures of (tmp)2GaOPh (18) and (tmp)2GaPh (20) show trigonal planar‐coordinated gallium atoms. Planarcoordinated nitrogen atoms with a GaN bond length of 188 pm are present in 20. In contrast, 18 shows one planar‐ and one slightly pyramidal‐coordinated nitrogen atom, and this results in two different bond lengths of 184.9 and 181.8 pm, respectively.