Dimethyl hydrazine-1,2-dicarboxylate–triphenylphosphine oxide (1/1)

Abstract

Key indicators: single-crystal X-ray study; T = 200 K; mean (C-C) = 0.003 Å; R factor = 0.036; wR factor = 0.095; data-to-parameter ratio = 13.0.In the crystal structure of the title compound, C 4 H 8 N 2 O 4 Á-C 18 H 15 OP, two triphenylphosphine oxide molecules and two dimethyl hydrazine-1,2-dicarboxylate molecules are connected via N-HÁ Á ÁO hydrogen bonds of moderate strength and are related via a twofold rotational axis. Weak C ar -HÁ Á Á O contacts strengthen the crystal structure. Related literature ExperimentalCrystal data

Synthesis and Properties of Higher Nuclearity Polyazanes

“…Starting from the Me 2 Ne nd, the bond lengths are 1.408,a nd 1.383 .T hey are shorter than the bond length found in hydrazine (1.446 ), but close to the one reported on carboxylate-protected 1,2-dimethyl hydrazine-1,2-dicarboxylate (1.386 ). [26] The dimethylamino nitrogen displays as p 3 hybridization, and the remaining two nitrogen atomsa re sp 2 hybridized, albeit the sum of bond angleso ft he centrala tom is closer to 3608 than that of the terminal sp 2 one (357.8 vs. 352.48). This difference reflects the influence of the carboxylate groups.T he dihedrala ngle along the Nc hain is 1058 (Figure 2).…”