Magnesium Cyanide or Isocyanide?

ABSTRACT: Preference for the binding mode of the CN^- ligand to Mg (Mg-CN vs. Mg-NC) is investigated. A monomeric Mg complex with a terminal CN ligand was prepared using the dipyrromethene ligand ^Mes DPM which successfully blocks dimerization. While reaction of (^Mes DPM)MgN(SiMe₃ )₂ with Me₃ SiCN gave the coordination complex (^Mes DPM)MgN(SiMe₃ )₂ ⋅NCSiMe₃ , reaction with (^Mes DPM)Mg(nBu) led to (^Mes DPM)MgNC⋅(THF)₂ . A Mg-NC/Mg-CN ratio of ≈95:5 was established by crystal-structure determination and DFT calculations. IR studies show absorbances for CN stretching at 2085 cm^-1 (Mg-NC) and 2162 cm^-1 (Mg-CN) as confirmed by ¹³ C l

SUBMITTER: Ballmann G 

PROVIDER: S-EPMC6856803 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature