期刊
NEW JOURNAL OF CHEMISTRY
卷 44, 期 31, 页码 13357-13367出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nj03106b
关键词
-
资金
- Croatian Science Foundation [IP-2016-06-4221]
Unsymmetrically substituted carbohydrazides, containing chelatingo-hydroxyaryl and non-chelating pyridyl subunits were synthesizedviatwo-step functionalization of carbohydrazide. Anion binding and coordinative propensities of the compounds were tested in reactions with appropriate Mo(vi) species. Such procedures yielded four types of products: monomeric dioxomolybdenum(vi) complexes, dimeric and oligomeric/polymeric dioxomolybdenum(vi)-containing ensembles, hybrid hexamolybdate systems where the protonated ligand acts as cation and the hybrid hexamolybdate salts where the cation is the protonated form of the monomeric dioxomolybdenum(vi) complex. The solid-state structures of the compounds were elucidated by X-ray diffraction and infrared spectroscopy, while their thermal stability was inspectedviathermogravimetric analysis and differential scanning calorimetry experiments. The behaviour of the ligands, monomeric, dimeric, and oligomeric/polymeric ensembles in DMSO solution was investigated by nuclear magnetic resonance. In the isolated materials, carbohydrazide ligands adopt altogether four distinctive protonation forms: neutral, monoprotonated in the corresponding hexamolybdate salt, doubly deprotonated while forming {MoO2}(2+)complexes, and neutral zwitterionic when shaping the hybrid salt. In all these structures the unsymmetrical carbohydrazide framework retains robust conformation and geometry.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据