About: Kryptoracemic compounds

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In Chemistry, a kryptoracemic compound or kryptoracemate (sometimes false conglomerate) is a racemic compound crystallizing in a Sohncke space group. In most of the cases, racemic compounds crystallize in centrosymmetric crystal structures. In a kryptoracemic compound the chemical composition of the crystal is racemic although the crystal belongs to space groups in which all enantiomerically pure molecules have to crystallize.

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  • In Chemistry, a kryptoracemic compound or kryptoracemate (sometimes false conglomerate) is a racemic compound crystallizing in a Sohncke space group. In most of the cases, racemic compounds crystallize in centrosymmetric crystal structures. In a kryptoracemic compound the chemical composition of the crystal is racemic although the crystal belongs to space groups in which all enantiomerically pure molecules have to crystallize. Crystallographically, in kryptoracemic compounds, the number of independent molecules in the asymmetric unit (Z′) is necessarily greater than 1 and should take an even value (to respect the racemic composition). By extension, the scalemic compounds (or unbalanced compounds), i.e. crystal with non-stoichiometric ratio of enantiomer, crystallizing in Sohncke space group are sometimes included in kryptoracemic compounds although they are not strito-sensu kryptoracemic. (en)
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  • In Chemistry, a kryptoracemic compound or kryptoracemate (sometimes false conglomerate) is a racemic compound crystallizing in a Sohncke space group. In most of the cases, racemic compounds crystallize in centrosymmetric crystal structures. In a kryptoracemic compound the chemical composition of the crystal is racemic although the crystal belongs to space groups in which all enantiomerically pure molecules have to crystallize. (en)
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  • Kryptoracemic compounds (en)
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