Stable group 8 metal porphyrin mono- and bis(dialkylcarbene) complexes: synthesis, characterization, and catalytic activity.

ABSTRACT: Alkyl-substituted carbene (CHR or CR₂, R = alkyl) complexes have been extensively studied for alkylcarbene (CHR) ligands coordinated with high-valent early transition metal ions (a.k.a. Schrock carbenes or alkylidenes), yet dialkylcarbene (CR₂) complexes remain less developed with bis(dialkylcarbene) species being little (if at all) explored. Herein, several group 8 metal porphyrin dialkylcarbene complexes, including Fe- and Ru-mono(dialkylcarbene) complexes [M(Por)(Ad)] (1a,b, M = Fe, Por = porphyrinato dianion, Ad = 2-adamantylidene; 2a,b, M = Ru) and Os-bis(dialkylcarbene) complexes [Os(Por)(Ad)₂] (3a-c), are synthesized and crystallographically characterized. Detailed investigations into their electronic structures reveal that these

SUBMITTER: Wang HX 

PROVIDER: S-EPMC7047983 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature