The crystal and molecular structure of hydrazine‐N, N′‐dicarbonic‐acid‐di‐(4‐chlorophenyl)‐ester Dihydrate, C₁₄H₁₀Cl₂N₂O₄ · 2 H₂O

Abstract

Tlic crystal antl iiiolecular structure of thr: title compound has been deteriiiinrd by X-ray tliffractioii techniques. It crystallizes in the inonociinic space g r o q C2/c with ct.11 parai i i~t e r s a = 30.719 (8), b = 5.016(3), c = 10.946(8) ! I , and p = 106.08(3)". The striicture

Preferences of the Oxalamide and Hydrazide Moieties in Vacuum and Aqueous Solution. A Comparison with the Amide Functionality

“…Biurea (X = NH) adopts the csc conformation, which was characterized as a minimum in the gas-phase for NdAH. Much more interesting are the compounds with X = S (dipotassium 1,2-hydrazine-bis(monothiocarboxylate) dihydrate, S , S ‘-dimethyl 1,2-hydrazine-bis(monothiocarboxylate) 30 ) or X = O (1,2-hydrazinedicarboxylic acid diethyl ester, N , N ‘-bis(( p -chlorophenoxy)carbonyl)hydrazine dihydrate) since they present the predicted lowest energy conformation tgt. More specifically, the torsion angle associated to the NH−NH bond ranges in absolute values from 73° to 91°.…”