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The first methylamine complexes of gold are reported. Both crystallize in chiral trigonal space groups. In bis(methylamine)gold(I) chloride [(CH 3 NH 2 ) 2 Au] +  Cl − , the gold and chlorine atoms lie on twofold axes in space group  P 3 1 21. The packing is largely determined by two hydrogen bonds of the form N–H···Cl, which combine to form chains of rings, the latter with graph setR  4  2   (  12  )  .    ${\rm{R}}_4^2(12).$    Aurophilic interactions are at best borderline [Au···Au 3.9014(2) Å]. Cyano(methylamine)gold(I), (CH 3 NH 2 )AuCN crystallizes in space group  P 3 1 ; the molecules are connected by short aurophilic contacts [Au···Au 3.1507(2) Å] to form spiral chains parallel to the  c  axis, and also by two hydrogen bonds of the form N–H···N≡C.

Aminkomplexe des Goldes, Teil 11 a : Strukturen zweier (Methylamin)gold(I)-Komplexe