Single-Crystal-to-Single-Crystal [2 + 2] Photodimerization Involving B←N Coordination with Generation of a Thiophene Host,Organometallics

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Single-Crystal-to-Single-Crystal [2 + 2] Photodimerization Involving B←N Coordination with Generation of a Thiophene Host
Organometallics ( IF 2.5 ) Pub Date : 2020-06-08 , DOI: 10.1021/acs.organomet.0c00258
Gonzalo Campillo-Alvarado ₁ , Changan Li ₁ , Zhiting Feng ₁ , Kristin M. Hutchins ₁ , Dale C. Swenson ₁ , Herbert Höpfl ₂ , Hugo Morales-Rojas ₂ , Leonard R. MacGillivray ₁

Affiliation

We report on B←N coordination to support a single-crystal-to-single-crystal reaction in the solid state. A [2 + 2] photodimerization is achieved with face-to-face π-stacks of monotopic B←N adducts composed of a phenylboronic acid catechol ester and an alkene with a terminal thiophene group. The photoreaction generates a ditopic B-adduct involving a head-to-tail cyclobutane regio- and stereoselectively. The photodimerization is accompanied by an increase in the tetrahedral character of the B atom. The resulting boron enables channel confinement of chloroform upon recrystallization.

中文翻译：

单晶体到单晶体[2 + 2]涉及B←N配位与噻吩主体的光二聚化。

我们报道了B←N配位，以支持固态的单晶至单晶反应。[2 + 2]光二聚反应是通过面对面的π-堆叠单峰B←N加合物实现的，该峰由苯基硼酸邻苯二酚酯和带有末端噻吩基团的烯烃组成。光反应产生对位和立体选择性的头到尾环丁烷的对位B加合物。光二聚化伴随着B原子的四面体特征的增加。所得到的硼在重结晶时能使氯仿通道受限。

更新日期：2020-06-23

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