An Inorganic N-Amino Analogue of Pyrrole: a Five-Membered Ring with Methylhydrazine and Two B Atoms as Building Blocks

The compound, 1-methyl-4-methylamino-3,5-diphenyl-1,2,4-triaza-3,5-diborole, C₁₄H₁₈B₂N₄, has been synthesized from bis(dimethylamino)phenylborane and methylhydrazine. The molecular structure of the planar ring system is best described as an inorganic N-methylaminopyrrole with two rather short and two normal B-N bonds [1.40 (1) and 1.44 (1) Å, mean] and a short N-N bond [1.414 (5) Å] in the ring [exocyclic N-N 1.441 (4) Å].

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