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1,1'-Binaphthyl-2,2'-dicarboxylic acid-urea (1/1).

ABSTRACT: In the title co-crystal, C(22)H(14)O(4)·CH(4)N(2)O, the 1,1'-binaphthyl-2,2'-dicarboxylic acid (BNDA) and urea mol-ecules are connected via a system of hydrogen bonds into a chiral two-dimensional polymeric structure parallel to the (001) plane. As the crystal is centrosymmetric, it consists of alternately stacked BNDA-urea layers of opposite chirality. The urea H atoms trans to the C=O group are bonded in a chelating mode [R(1) (2)(6)] to the carbonyl O atom from one of the carboxylic acid groups which, in turn, acts as the donor of an O-H?O hydrogen bond to another urea mol-ecule. The [010] chains thus formed are further connected via an R(2) (2)(8) hydrogen-bond motif formed between urea and the second carboxylic acid group of BNDA.

SUBMITTER: Izotova L 

PROVIDER: S-EPMC2959427 | biostudies-literature | 2008

REPOSITORIES: biostudies-literature

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1,1'-Binaphthyl-2,2'-dicarboxylic acid-urea (1/1).

Izotova Lidiya L   Ashurov Jamshid J   Talipov Samat S   Ibragimov Bakhtiyar B   Weber Edwin E  

Acta crystallographica. Section E, Structure reports online 20080917 Pt 10

In the title co-crystal, C(22)H(14)O(4)·CH(4)N(2)O, the 1,1'-binaphthyl-2,2'-dicarboxylic acid (BNDA) and urea mol-ecules are connected via a system of hydrogen bonds into a chiral two-dimensional polymeric structure parallel to the (001) plane. As the crystal is centrosymmetric, it consists of alternately stacked BNDA-urea layers of opposite chirality. The urea H atoms trans to the C=O group are bonded in a chelating mode [R(1) (2)(6)] to the carbonyl O atom from one of the carboxylic acid grou  ...[more]

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