No abstract

2 , 4) containing a carbodiimido ligand and a C-coordinated 5-membered tetrazolato ligand. X-Ray structures of 1 and 2 identified the formation of palladium() complexes with a carbodiimido group, in which a nitrogen of the linear N᎐ ᎐ C᎐ ᎐ N moiety is bonded to the metal center, and with a tetrazolato ring formed via 1,3-dipolar cycloaddition of the isocyanide to the coordinated azido bond. Heating the isolated complexes 1 and 3 at 60 ЊC for 5 h converted them into the bis(carbodiimido)palladium() complexes,). The reactions of 2,6-dimethylphenyl isocyanide with Pd(N 3 ) 2 L 2 (L = PMe 3 , PEt 3 ) also gave the same complexes directly. Reaction of Pd(N 3 ) 2 (dppe) with 2,6-dimethylphenyl isocyanide also caused the formation of the bis(carbodiimido) complex Pd[N᎐ ᎐ C᎐ ᎐ N-2,6-Me 2 C 6 H 3 ] 2 (dppe), 7 in 75% yield. However, reactions of M(N 3 ) 2 (PMe 3 ) 2 (M = Pd or Pt) with tert-butyl isocyanide resulted in the formation of bis(tetrazolato) compounds, M[CN 4 (R)] 2 (PMe 3 ) 2 (R = tert-butyl, M = Pd, 8; Pt, 9) by the cycloaddition of isocyanide to the coordinated azido bond. The same reactions with other isocyanides such as cyclohexyl and n-butyl isocyanides afforded bis(tetrazolato) complexes, trans-M[CN 4 (R)] 2 L 2 (M =