Size-Selective Vapochromic Platinum(II) Complex with a Sterically Demanding Pincer-Type N-Heterocyclic Carbene Ligand

Abstract

A pyridine-based pincer-type N-heterocyclic carbene complex of Pt(II), [Pt(II)( mes C ∧ N ∧ C)CO](PF 6 ) 2 ( mes C ∧ N ∧ C = 2,6-bis(1-mestylimidazol-2-ylidenyl)pyridine), displays size-selective vapochromic behavior upon exposure to small molecules with donor atoms. An acetone adduct showing a weak interaction between acetone and a C≡O ligand is also structurally determined.