Oxidative Addition and Redox Reactions

Such C—H activation reactions were extended to the related Sn systems. The rates of addition for this chemistry were 4 to 6 times slower for the latter compared with the Ge reactions, in order to avoid the competing formation of Sn(I)[N(SiMe3)2]2Ph. Thus, similar 

Sn(I)[N(SiMe3)2]2R compounds were obtained from the tin(II) amide/Phl/RH with RH = thf, C6H12, Et2O or 1,4-dioxane, as well as others with R = CH2OBu (from MeOBu ) and a mixture of CsHn isomers (ca. 6.2 1, secondary to primary). 

Making use of an earlier finding that Sn compounds containing Sn—CH2R bonds were suitable for Stille cross-coupling reactions,one-pot C—H activation and cross-coupling products were isolated in modest yields (21 % from MeOBu and 5 % from n-CsH 12 based on Sn amide) as shown in Equation (9.13) (R CH2OBU or n-CsHn).  

The cyclic diaminogermylenes (jeN(Bu )X Bu (X = CH2CH2 or CH=CH) with TEMPO yielded 1 2 ONC(Me)2(CH2)3CMe2 adducts. The unsaturated germylene and its isoleptic C°, Si and Sn compounds gave the EPR-characterised radicals 

Ge[N(SiMe3)2]2 in CeHg at 25 °C with H2 was converted into Ge(H)2[N(SiMe3)2]2 using Ni[Ge N(SiMe3)2 2](PEt3)2 (2 mol %) as catalyst. Treatment of this Ge amide 

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