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N-Phenyl-N-[(E)-2-(4,4,5,5-tetra-methyl-1,3,2-dioxaborolan-2-yl)ethen-yl]aniline.

ABSTRACT: The title compound, C₂₀H₂₄BNO₂, has a polarized π-system due to significant resonance between the N-C(H)=C(H)-B and ionic N⁺=C(H)-C(H)=B^- canonical forms. The dihedral angles between the NC₂B plane (r.m.s. deviation 0.0223 Å) and the C₃N (r.m.s. deviation 0.0025 Å) and BCO₂ (r.m.s. deviation 0.0044 Å) planes are 2.51 (12) and 3.09 (19)°, respectively. This indicates the lone pair of the nitro-gen atom and a vacant p orbital of the boron atom are conjugated with the central C=C bond. In comparison with the carbazole analogue [Hatayama & Okuno (2012 ▸). Acta Cryst. E68, o84], the C-N and C-B bonds are shorter. The results are well explained by the increase in the contribution of the N⁺=C(H)-C(H)=B^- canonical form in the title compound.

SUBMITTER: Hatayama Y

PROVIDER: S-EPMC9028550 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature

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N-Phenyl-N-[(E)-2-(4,4,5,5-tetra-methyl-1,3,2-dioxaborolan-2-yl)ethen-yl]aniline.

Hatayama Yuki Y Akagi Kazuto K Okuno Tsunehisa T

IUCrData 20220128 Pt 1

The title compound, C20H24BNO2, has a polarized π-system due to significant resonance between the N-C(H)=C(H)-B and ionic N+=C(H)-C(H)=B- canonical forms. The dihedral angles between the NC2B plane (r.m.s. deviation 0.0223 Å) and the C3N (r.m.s. deviation 0.0025 Å) and BCO2 (r.m.s. deviation 0.0044 Å) planes are 2.51 (12) and 3.09 (19)°, respectively. This indicates the lone pair of the nitro-gen atom and a v ...[more]

PMID: 36337091

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