9-[(Z)-2-(4,4,5,5-Tetra­methyl-1,3,2-dioxaborolan-2-yl)ethen­yl]-9H-carbazole

ABSTRACT: The title compound has a polarized π-system due to resonance between N—C(H)=C(H)—B and ionic N+=C(H)—C(H)=B− canonical structures. In comparison with the previously reported E-isomer, the reduced planarity of Z-isomer results in a decrease of the contribution of the N+=C(H)—C(H)=B− canonical structure. The title compound, C20H22BNO2, has a polarized π-system due to resonance between N—C(H)=C(H)—B and ionic N+=C(H)—C(H)=B− canonical structures. The dihedral angles between the ethenyl plane (r.m.s. deviation for C2H2 = 0.0333 Å) with the ethenyl-C(NC2-pyrrole) plane (r.m.s. deviation CNC2 0.0423 Å) and the ethenyl-C(BO2-1,3,2-dioxaborolane) plane (r.m.s. deviation BCO2 0.0082 Å) are 45.86 (8) and 37.47 (8)°, respectively, and are greater than those found for the previously reported E-isomer

SUBMITTER: Kanagawa M 

PROVIDER: S-EPMC9462315 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature