A hydrogen-bridged adduct 3,4,6,7,8,9-hexahydro-2H-pyrimido[1,2-a]pyrimidin-1-ium [1,3-bis(tert-butyldimethylsilyloxy)-1,3-bis(pyridin-2-yl)propan-2-ylide ne]nitronate acetonitrile monosolvate

作者：Schulz Martin^*; Goerls Helmar; Westerhausen Matthias

来源：Acta Crystallographica Section E-Structure Reports Online, 2011, 67: O2396-U836.

DOI：10.1107/S1600536811033927

The title compound, C7H14N3+center dot C25H40N3O4Si2-center dot CH3CN, was obtained by the reaction of 2-nitro-1,3-di(pyridin-2-yl)-1,3-di(tert-butyldimethylsilyloxy)propane with 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine. Two hydrogen bonds stabilize the Lewis acid/base pair of the nitronate and the guanidinium moiety with N center dot center dot center dot O distances of 2.772 (3) and 2.732 (3) angstrom. Both hydrogen atoms are more closely bound to the guanidinium [N-H distances of 0.83 (3) and 0.93 (3) angstrom] than to the nitronate moiety. The nitronate is double-bonded to the respective carbon with an N=C bond length of 1.316 (3) angstrom.

• 出版日期2011-9