Differences in the crystal structures of two dialkyl diester triphenyl-phospho-nium ylids
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Castãeda, Fernando
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Differences in the crystal structures of two dialkyl diester triphenyl-phospho-nium ylids
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Hydrogen bonding and crystal packing play major roles in determining the conformations of ethyl methyl 2-(triphenyl-phospho-ranyl-idene)malonate, Ph3P=C(CO2CH3)CO2CH2CH3 or C24H23O4P, (I), and dimethyl 2-(triphenyl-phosphor- anyl-idene)malonate, Ph3P=C(CO2CH3)2 or C23H21O4P, (II). In (I), the acyl O atom of the ethyl ester group is anti to the P atom, while the O atom of the methyl ester group is syn. In (II), the dimethyl diester is a 1:1 mixture of anti-anti and syn-anti conformers. © International Union of Crystallography 2007.
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URI: https://repositorio.uchile.cl/handle/2250/158086
DOI: 10.1107/S0108270107010542
ISSN: 01082701
01082701
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Acta Crystallographica Section C: Crystal Structure Communications, Volumen 63, Issue 4, 2018,
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