Abstract: | Molecular and Crystal Structure of the dimeric Magnesium bisbis(trimethylsilyl)-amide] The magnesium bisbis(trimethylsilyl)amide] crystallizes as a dimeric molecule in the space group C2/c with {a = 1821.0(4); b = 1494.4(4); c = 1859.6(6) pm; β = 121.10(2)°; Z = 4 dimers}. The cyclic planar Mg2N2 moiety shows endocyclic NMgN angles of 95.8°. The bond lengths within this ring system to the four-coordinate, bridging nitrogen atoms Nb are 215 pm, whereas the distances between the magnesium atom and the terminal, three-coordinate nitrogen atom Nt display values of approximately 198 pm. These different coordination numbers of the nitrogen atoms affect the NSi bond length (NtSi 171, NbSi 177 pm). |