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Hexasilsesquioxane cages (T6) have been prepared from a range of alkyl and aryl trichlorosilanes using a "non aqueous" hydrolysis with dimethyl sulfoxide.

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Reaction of Li(CH2PR2)(tmeda) (R = M e or Ph; tmeda = N,N, N',N'-tetramethylethylenediamine); compound (2), the diphenyl analogue of ( l ) , is accessible either b y reaction of (3) and further Li(CH2PPh2)(tmeda) or b y lithiation of Ph2PCH2C(OH)Buf2: the y-P-functionalised lithium alkoxides (1 )-(3) are shown b y X-ray crystallography t o have Li-P bonds and very short Li-0 and Li --Li contacts, and compound (3) is structurally similar to the adduct proposed as an intermediate in the important carbanionic alkylation of a ketone.