Bis methanide

Harder prepared the two bis(methanide) complexes 39 and 40 from the respective reactions between the parent methane and the relevant bis-amide [M N(SiMe3) 2].34,35 Under no circumstances could a second deprotonation be observed. In common with 38, 39 and 40 were found to contain calcium- and barium-methanide contacts in the solid state. 

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