Hypercoordination by Multiple Dangling Benzylmethoxy Ligands in Highly Crowded Triaryltin Bromide [(2-MeOCH C H )] SnBr and Diaryltin Mixed Halides [(2-MeOCH C H )] SnBrCl, and a related Distannane and Distannoxane.

The reaction between the Grignard reagent formed from Mg and 2-bromobenzylmethyl ether and SnCl produced four products: [2-(MeOCH )C H ] SnBr (1), [2-(MeOCH )C H ] SnX (2, X =Br (a) and BrCl (b)), [{2-(MeOCH )C H } Sn] (3), and [{2-(MeOCH )C H } SnBr] O (4). In the case of 1, two of the three dangling arm O atoms coordinate to the central tin atom with O-Sn internuclear distances of 2.53 (O1) and 2.