Cambridge Structural Database hydrogen bonding interactions

Figure 4.22 Two ways of retrieving hydrogen bonded 3D-nets from the Cambridge Structural Database. Unspecified bonds between C and O enables any kind of carboxylate unit to be found. In addition, in a a O-H bond has been specified as polymeric and in b a non-bonded interaction has been specified between N and 0. In both cases the data set has to be further analysed to yield the 3D hydrogen bonded structure [27] shown as the result.

As for carboxylate-hydrogen bond donor interactions, carboxylate-metal ion interactions are expected to be most favorable with syn stereochemistry. In a survey of the Cambridge Structural Database, Carrell et al. (1988) presented a stereochemical analysis of carboxylate—metal ion interactions which supports this expectation (Scheme 1). These investigators found that the syn-oriented lone electron pair of the carboxylate... 

The Cambridge Structural Database, p. 141 Crystal Growth Mechanisms, p. 364 Hydrogen Bonding, p. 658 n—n Interactions Theory and Scope, p. 1076 Polymorphism, p. 1129... 

The Cambridge Structural Database, p. 161 Cation-n interactions p. 214 Concepts in Crystal Engineering, p. 319 Crystal Engineering with Hydrogen Bonds, p. 357 DNA Nanotechnology, p. 475 Halogen Bonding, p. 628... 

We noted in over 100 diaryl urea structures (Table 5.1) extracted fi om the February 2009 update of the Cambridge Structural Database (version 5.30) [35] that the molecular conformation is planar in nonurea crystal structures, i.e. those having N-H- - -Npyndyi, N-H- - -Onitro. N-H- -Osoivent hydrogen bond as the primary interaction together with... 

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