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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Molecular,supramolecular and solution structures of peroxovanadium complexes with ON and O_3N donor set ligands:two new types of cationic-anionic peroxovanadium(v)peroxovanadates(V)
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Molecular,supramolecular and solution structures of peroxovanadium complexes with ON and O_3N donor set ligands:two new types of cationic-anionic peroxovanadium(v)peroxovanadates(V)

机译：具有ON和O_3N供体集配体的过氧钒络合物的分子，超分子和溶液结构：两种新型的阳离子-阴离子过氧钒（v）过氧钒酸盐（V）

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The complexes,[VO(O_2)(pa)_2]ClO_4-3H_2O(1),[VO(O_2)(pa)_2][VO(O_2)_2(pa)]-3H_2O(2),[VO(O_2)(pa)_2][VO(O_2)-(ada)]-2H_2O(3)and [VO(O_2)(pa)(pca)]-H_2O(4)[pa = picolinamide,ada = carbamoylmethyliminodiacetate(2-)and pea = 2-pyrazinecarboxylate(l-)],were synthesized.2 and 3 are new types of peroxovanadium complexes:mono-peroxovanadium diperoxovanadate(2)and monoperoxovanadium monoperoxovanadate(3).The complexes were characterized by chemical analysis and IR spectroscopy,and 1,3 and 4 also by X-ray analysis.The structure of 1 is disordered,with alternating positions of the oxo and peroxo ligands.The peroxo oxygen atoms,O_p,in 1 are involved in weak hydrogen bonds with water molecules and close intramolecular C-H...O_p bonds [d(H...O_p)~ 2.0 A].The supramolecular structure of 1 is formed by a network of hydrogen bonds and strong attractive intermolecular pi-pi interactions between the pyridine rings.The supramolecular architecture in 4 is constructed by(N,O)-H...O hydrogen bonds between the neutral complex molecules and water of crystallization.The peroxo oxygen atoms in 4 form intramolecular C-H...O_P bonds [d(H...O_p)= 2.303 A].The pa and pea ligands are ON coordinated via the oxygen atoms of the C(NH_2)=O and COO~ groups,respectively,and nitrogen atoms of the heterocyclic rings,and ada as a tetradentate O_3N ligand.The thermal analysis of 4 showed that the loss of water of crystallization and the active oxygen release(T_(min)/deg C 82,T_(max)/deg C 165)are,under given conditions,individual processes separated by the temperature interval 90-132 °C.The solution structures and stability were studied by UV-VIS and ~51V NMR spectroscopies.
机译：络合物[VO（O_2）（pa）_2] ClO_4-3H_2O（1），[VO（O_2）（pa）_2] [VO（O_2）_2（pa）]-3H_2O（2），[VO（O_2 ）（pa）_2] [VO（O_2）-（ada）]-2H_2O（3）和[VO（O_2）（pa）（pca）]-H_2O（4）[pa =吡啶甲酰胺，ada =氨基甲酰基甲基亚氨基二乙酸酯（2- ）和豌豆= 2-吡嗪羧酸酯（l-）]。合成2和3是新型的过氧钒配合物：过氧单戊二酸二过氧钒酸盐（2）和单过氧钒一过氧钒酸盐（3）。通过化学分析和红外光谱对其进行了表征，1,3和4也通过X射线分析。1的结构是无序的，氧代和过氧配体的位置交替。1中的过氧氧原子O_p与水分子和分子内紧密的CH ... O_p键[d（H ... O_p）〜2.0 A]。超分子结构1是由氢键网络和吡啶环之间强烈的有吸引力的分子间pi-pi相互作用形成的。 4中的结构是由（N，O）-H ... O之间的氢键构成一个中性的络合物分子和结晶水。4个中的过氧氧原子形成分子内CH ... O_P键[d（H ... O_p）= 2.303 A]。pa和pea配体通过C（NH_2）= O和COO〜基团，以及杂环的氮原子，以及ada作为四齿O_3N配体。对4的热分析表明，结晶水的损失和活性氧的释放（T_ （min）/°C 82，T_（max）/ deg C 165），在给定条件下，各个过程之间的温度间隔为90-132°C。通过UV-VIS和〜51V研究溶液的结构和稳定性NMR光谱学。

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