Synthesis of three d10 compounds based on N-(3-pyridylmethyl)benzimidazole, the effect of radius of metal ions on structure and the function of ligand
作者:Meihua Huang、Ping Liu、Yun Chen、Jian Wang、Zheng Liu
DOI:10.1016/j.molstruc.2005.12.002
日期:2006.5
been synthesized and characterized by single crystal X-ray analysis and fluorescence spectra as well as TGA analysis. The Zn 2+ compound is monomeric, the Cd 2+ complex is of double-bridge chain, while the Hg 2+ complex is of wave-like chain. These compounds reveal the metal radius interaction on structural types and the function of ligand.
Electrostatic Potential Differences and Halogen-Bond Selectivity
作者:Christer B. Aakeröy、Tharanga K. Wijethunga、John Desper、Marijana Đaković
DOI:10.1021/acs.cgd.5b01770
日期:2016.5.4
kJ/mol, and in all of the co-crystals found herein (7/7), the halogen-bonddonor favored the best acceptor site. These results allow us to propose some tentative guidelines and rationales for halogen-bond preferences in competitive systems. If ΔE < 35 kJ/mol, the electrostatic potential difference is not large enough to allow the donor molecules to form halogen bonds of sufficiently different thermodynamic
Methanol as the C<sub>1</sub> source: redox coupling of nitrobenzenes and alcohols for the synthesis of benzimidazoles
作者:Hengzhao Li、Yuntong Zhang、Zihan Yan、Zemin Lai、Ruoyan Yang、Mengqi Peng、Yanhao Sun、Jie An
DOI:10.1039/d1gc03907e
日期:——
We present an operationally simple redox coupling for the synthesis of N-1 substituted benzimidazoles using feedstock building block 2-nitroaniline derivatives as the precursors and methanol as the C1 source. Higher atom, step, and redox economies and excellent regioselectivity were achieved compared with conventional synthesis using diaminobenzene and formic acid derivatives.
我们提出了一种操作简单的氧化还原偶联,用于合成 N-1 取代的苯并咪唑,使用原料构建块 2-硝基苯胺衍生物作为前体,甲醇作为 C 1源。与使用二氨基苯和甲酸衍生物的常规合成相比,实现了更高的原子、步骤和氧化还原经济性以及出色的区域选择性。
Ranking Relative Hydrogen-Bond Strengths in Hydroxybenzoic Acids for Crystal-Engineering Purposes
作者:Christer B. Aakeröy、Kanishka Epa、Safiyyah Forbes、Nathan Schultheiss、John Desper
DOI:10.1002/chem.201301402
日期:2013.10.25
Systematic co‐crystallizations resulting in a total of six new crystal structures involving either 3‐hydroxy‐ or 4‐hydroxybenzoic acid, complemented by calculated molecular electrostatic potential surfaces and existing structural data, have shown that in a competitive molecular recognition situation, the OH moiety is a more effective hydrogen‐bond donor than the COOH moiety which, in turn, highlights