¹⁵N NMR spectroscopic determination of the structure of trimethylsilyl derivatives of acylated and carboxylated hydrazines. Communication 1. The structures of 1,2-diacetyl- and 1,2-dicarbomethoxyhydrazines

Conclusions

• 1. A general method was proposed for the structural determination of trialkylsilylated derivatives of N-acyl- and N-carboalkoxyhydrazines using¹⁵N NMR spectroscopy. The¹⁵N NMR chemical shifts,$J_{^{15} H,^{29} Si}$ and$J_{^{15} NSiC^1 H} H$ parameters characteristic for these compounds were found.

• 2. 1,2-Bistrimethylsilyl-1,2-dicarbomethoxyhydrazine is a mixture of the three possible “amide” conformers, while the bistrimethylsilyl derivative of 1,2-diacetylhydrazine is a symmetrical “imide” isomer with trans orientation of the methyl groups relative to the unshared pairs of the nearest nitrogen atoms.