Weak C-H⋯O hydrogen bonds in anisaldehyde, salicyl-aldehyde and cinnamaldehyde

Abstract

In situ cryocrystallization has been employed to grow single crystals of 4-meth-oxy-benzaldehyde (anisaldehyde), C 8H 8O 2, 2-hy-droxy-benzaldehyde (salicyl-aldehyde), C 7H 6O 2, and (2E)-3-phenyl-prop-2-enal (cinnamaldehyde), C 9H 8O, all of which are liquids at room temperature. Several weak C - H⋯O inter-actions of the types Caryl - H⋯O, Cformyl - H⋯O and Csp 3 - H⋯O are present in these related crystal structures. © 2011 International Union of Crystallography.