5,7-syn-Bis(trimethylsilyl)-5-norbornene-2,3-endo-dicarboxylic acid: a rare co-existence of dimeric and catemeric synthons.

The crystal and molecular structure of the title compound, C(15)H(26)O(4)Si(2), reveals a self-assembly facilitated via the rare co-existence of dimeric and catemeric patterns, which is attributed to the influence of the trimethylsilyl groups. The structure is dicussed in the context of a database search and subsequent analysis of structures of cis-1,2-dicarboxylic acids.