Synthesis and crystal structure of bis (Tetrabutylammonium)(4,4 '-Azodi(phenylcyanamide)) salt center dot[(n-Bu)(4)N](2)[Azodicyd(2-)]center dot H2O

摘要

The chemical preparation and crystal structure for a 4,4'-azodi(phenylcyanamide) salt) in the solid state are reported. This compound crystallizes in the triclinic space group P (1) over bar with the following unit cell parameters: a = 9.759(3) angstrom, b = 11.237(4) angstrom, c = 11.919(4) angstrom, alpha = 95.54(3)degrees, beta = 98.50(3)degrees, gamma = 109.39(2)degrees, Z = 1 and V = 1204.4(7) angstrom(3). The 4,4'-azodi(phenylcyanamide) dianion, azodicyd(2-), is approximately planar, with the cyanamide groups (-N=C=N) in an anti conformation relative to each other and the azo group (-N=N-) adopting the more thermodynamically stable trans conformation. The crystal X-ray analysis shows that there are one azo molecule cation, two tetrabutylammonium cations and one water molecule in unit cell. Intermolecular O-H center dot center dot center dot N hydrogen bonds may be effective in the stabilization of the crystal structure of this compound and to form linear chain structure in the packing.