New synthesis of Fischer-type hydrazino(alkyl) complexes. First X-ray characterisation of a chelate hydrazino derivative

Abstract

The first Fischer-type hydrazino(methyl)carbene complex has been synthesized from the appropriate acetylhydrazine and Na₂Cr(CO)₅; the new complex has some peculiar features in comparison with aminocarbene complexes: (i) the E rotamer can be completely transformed into the Z rotamer through the formation of its anion, and (ii) as a result of a thermal reaction, the Z isomer affords a new unusual chelate hydrazino(methyl)carbene complex that can be mono- or di-alkylated.

References

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