Chloro- and Trifluoromethyl-Substituted Flanking-Ring m-Terphenyl Isocyanides: η6-Arene Binding to Zero-Valent Molybdenum Centers and Comparison to Alkyl-Substituted Derivatives

摘要: Presented herein are synthetic and structural studies exploring the propensity of m-terphenyl isocyanide ligands to provide flanking-ring η6-arene interactions zerovalent molybdenum centers. The alkyl-substituted isocyanides CNArMes2 CNArDipp2 (ArMes2 = 2,6-(2,4,6-Me3C6H2)2C6H3; ArDipp2 2,6-(2,6-(i-Pr)2C6H3)2C6H3) react with Mo(η6-napthalene)2 in a 3:1 ratio form tris-isocyanide Mo complexes, which flanking mesityl or 2,6-diisopropylphenyl group, respectively, one ligand is bound center. Thermal stability reactivity show that these ring particularly robust. To weaken prevent formation interaction, potentially access coordinatively unsaturated [Mo(CNArR)3] fragment, new halo-substituted CNArClips2 CNArDArF2 (ArClips 2,6-(2,6-Cl2C6H3)2(4-t-Bu)C6H2; ArDArF2 2,6-(3,5-(CF3)2C6H3)2C6H3) have been p...