
TY  - JOUR
A1  - Engelhardt, LM 
A1  - Jolly, BS 
A1  - Junk, PC 
A1  - Raston, CL 
A1  - Skelton, BW 
A1  - White, AH 
T1  - Highly Hindered Amido-Lithium and Amido-Magnesium Complexes. Crystal-Structures of [Li(Mu-N(SiMe3)2)(Tetrahydrofuran)]2 and [MgBu<sup>s</sup>(Mu-N(SiMe<sub>3</sub>)<sub>2</sub>)]2
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1986
VL  - 39
IS  - 9
SP  - 1337
EP  - 1345
KW  - 
UR  - https://doi.org/10.1071/CH9861337 
N2  - Treatment of hexamethyldisilazane in thf (tetrahydrofuran) with LiBu in hexane yields [Li{&#956;-N(SiMe3)2}(thf)]2, (1). MgBu8Bu in heptane with hexamethyldisilazane results in initially formation of [MgBus(&#956;- N(SiMe3)2}]2, (2), then ?Mg{N(SiMe3)2}2,(3). The structures of (1) and (2) have been determined by X-ray diffraction. Remarkably, they are isomorphous: crystals are tetragonal, space group P4n2 with a 9.970(7), c 16.753(9) &#506; for (1), and a 9.524(6), c 17.385(9) &#506; for (2), with Z = 2. The lattices are comprised of discrete molecules with symmetry 222, and thus Bus disorder in (2), yith the amido ligands bridging three- coordinate metal centres [Li-N 2.025(9), Li-O 1.882(14) &#506;, Li-N-Li 73.7(5)&#176;, N-Li-N 106.3(6)&#176;, O-Li-N 126.8(3)&#176; (1); Mg-N 2.118(4), Mg-C 2.08(1) &#506;, Mg-N-Mg 87.1(2)&#176;, N-Mg-N 92.9(2)&#176;; C-Mg-N 133.6(1)&#176;(2)]. 
ER  -

