Structural Organization of Dibromodiazadienes in the Crystal and Identification of Br···O Halogen Bonding Involving the Nitro Group
作者:Valentine G. Nenajdenko、Namiq G. Shikhaliyev、Abel M. Maharramov、Gulnar T. Atakishiyeva、Aytan A. Niyazova、Naila A. Mammadova、Alexander S. Novikov、Ivan V. Buslov、Victor N. Khrustalev、Alexander G. Tskhovrebov
DOI:10.3390/molecules27165110
日期:——
Nitro functionalized dibromodiazadiene dyes were prepared and fully characterized including X-ray single crystal analysis. Electron deficient dibromodiazadienes were found to be able to act as donors of halogen bonding (XB), while the nitro group acted as an acceptor of the XB. Depending on the substituents, the Br···O XB competed with other weak interactions, and for some of the dyes, they even outcompeted
制备了硝基官能化二溴二氮杂二烯染料并对其进行了全面表征,包括 X 射线单晶分析。发现缺电子二溴二氮杂二烯能够充当卤素键 (XB) 的供体,而硝基充当 XB 的受体。根据取代基的不同,Br···O XB 与其他弱相互作用竞争,对于某些染料,它们甚至超过了涉及硝基的 XB。然而,硝基官能化的二溴烯烃6a和10a仅具有硝基部分作为 XB 的最合理受体,通过 BrO XB 可靠地形成一维链。实验工作得到了在 Bader 理论(QTAIM 方法)框架内的电子密度分布的 DFT 计算和拓扑分析的支持。