Crystal and molecular structure of trans-4-aminocrotonic acid

Abstract

Crystals of the title compound are monolclinic, space group P2₁/c, a= 8.863(3), b= 7.870(2), c= 14.971(5)Å, β= 115.37(3)°, Z= 8. The structure was solved by direct methods and refined by least-squares procedure to a value R 0.048 for 1 834 observed diffraction maxima. The location of all hydrogen atoms (difference-Fourier synthesis) shows that the molecules are zwitterions linked by a three-dimensional network of hydrogen bonds.