Metal silylamides

Table 72.6 Ethylene polymerization with silica-supported rare-earth metal silylamide complexes.

The range of transition metal silylamides was also expanded to include the synthesis and structure of the yttrium species [Y N(SiMe3)2 3],2 which, like its previously reported scandium counterpart, has a pyramidal MN3 array. In the vapor phase, the... 

Analogous products were obtained from the reaction of silylene 85 with silyl lithium compounds, with alkali metal silylamides and alkali metal alkylamides, and sodium methoxide <2000CC1427, 2004JCD3288, 2005JCD2720, 2005CC5112>. In the case of the reaction with metallated silylamides a thermally initiated rearrangement (114 — 115) to give the new silylamide 115 took place (Scheme 11). 

The subsequent overview will be organized according to the number of group 15 element centers in open-chain silyl derivatives, i.e. EJC(SiR3) with x = 1 or 2, followed by silyl-substituted heterocycles and miscellaneous compounds including pseudohalogen derivatives R3Si-X with X = NCO, NCS and NSO as well as metal silylamides. 

To conclude the PE spectroscopic discussion of silyl derivatives of group 15 element compounds as retrieved from the literature search153, their pseudohalogen derivatives are listed in Table 75 and the metal silylamides in Table 76. As expected, exchange H - CH3... 

Several molecules, which likewise could have been included in Table 80, have already been listed elsewhere R3Si-SnR3 as a disilane homologue in Table 57, the phthalocyanine complexes due to their central R3Si-0(Si-0)1 2-SiR3 chains as silyl ethers in Table 74 or the various metal silylamides Met(N(SiR3)2)w as N derivatives in Table 76. The compounds in Table 80 are now commented on. 

Divalent metal silylamide complexes are easily obtained from the interaction of the corresponding REM with mercury amide in DME medium at room temperature [15] ... 

---