Effect of single-wall carbon nanotubes on direct epoxidation of cyclohexene catalyzed by new derivatives of cis-dioxomolybdenum(VI) complexes with bis-bidentate Schiff-base containing aromatic nitrogen–nitrogen linkers
作者:Masoud Salavati-Niasari、Mehdi Bazarganipour
DOI:10.1016/j.molcata.2007.09.009
日期:2007.12
characterisation of three dimeric cis-dioxomolybdenum(VI) complexes involving Schiff-base ligands is described. Ligands were obtained by condensation of salicylaldehyde with aromatic nitrogen–nitrogen linkers (4,4′-diaminodiphenylmethane; 4,4′-diaminodiphenylether; 4,4′-diaminodiphenylsulfone). [MoO2(acac)2] reacted with the prepared ligands; bis[(N,O-salicylidene)-4,4′-diaminodiphenyl]methane, H2L1; bis[(N
描述了涉及席夫碱配体的三种二聚体顺式-二氧代钼(VI)配合物的合成和表征。水杨醛与芳族氮-氮连接基(4,4'-二氨基二苯甲烷; 4,4'-二氨基二苯醚; 4,4'-二氨基二苯砜)缩合可得到配体。[MoO 2(acac)2 ]与制备的配体反应;双[(N,O-水杨基亚烷基)-4,4′-二氨基二苯基]甲烷,H 2 L 1;H 2 L 1。双[(N,O-水杨基亚烷基)-4,4-二氨基二苯基]醚,H 2 L 2;H 2 L 2。双[[ N,O-水杨基)-4,4'-二氨基二苯基]砜,H 2 L 3;形成六配位的顺式-dioxoMo(VI)配合物;[MoO 2 L 1-3 ] 2。黄色的,非电解的和抗磁性的化合物通过元素分析和光谱技术(IR,1 H NMR和UV-vis)表征。这些络合物在环己烯与叔丁基氢过氧化物(TBHP)的环氧化中显示出良好的催化活性和选择性,特别是对于络合物[MoO 2 L 3 ]
Binuclear half-sandwich ruthenium(II) Schiff base complexes: Synthesis, characterization, DFT study and catalytic activity for the reduction of nitroarenes
The binuclear ruthenium(II) p-cymene complexes containing Schiff base ligands of general composition [(Ru(p-cymene)Cl)2L1-6] (1-6) have been synthesized. The complexes were characterized by analytical and spectral (FT−IR, UV–Vis & 1H NMR) methods. The molecular structure of the representative complex [(Ru(p-cymene)Cl)2(L6)] (6) was determined by single-crystal X-ray diffraction and density functional
合成了具有一般组成[(Ru(对-cymene)Cl)2 L 1-6 ](1-6)的席夫碱配体的双核钌(II)对-cymene配合物。通过分析和光谱(FT-IR,UV-Vis和1 H NMR)方法对复合物进行了表征。通过单晶X射线衍射和密度泛函理论(DFT)计算来确定代表性络合物[(Ru(p- cymene)Cl)2(L 6)] (6)的分子结构。此外,这些半三明治钌络合物是在NaBH存在下将硝基芳烃温和氢化为芳族苯胺的活性催化剂在乙醇中加4。发现最有效的催化剂6与各种官能团的硝基芳烃相容。
Synthesis of benzo fused dioxadiazasilamacrocycles via remote dianion cyclization
An efficient and facile protocol for the synthesis of hitherto unreported benzo fused dioxadiazasilamacrocycles has been developed by intermolecular nucleophilic substitution of remotedianions generated in situ from symmetric and unsymmetric Schiff base ligands. The key step involves the initial formation of remotedianionfrom sequential deprotonation of phenolic OH groups of Schiff base ligands
α-AMINOPHOSPHONATES BEARING FREE HYDROXYL GROUPS IN THE AROMATIC RINGS. SYNTHESIS AND NMR CHARACTERIZATION
作者:Salvatore Failla、Paolo Finocchiaro、Gerhard Hägele、Vitaly I. Kalchenko
DOI:10.1080/10426509708031564
日期:1997.9
very good yields to mono- and bis-α-aminophosphonic acid dialkylesters containing the free phenolic hydroxyl group in a strategic position of the aromatic ring in order to enhance complexation with metal ions. This synthetic procedure is based on the addition of a solution of sodium dialkyl phosphite in phosphite to imine precursors. The addition reaction is highly stereospecific: only one diastereomer
The preparation and characterization of some uranium(VI) complexes of N,N′-bis(o-hydroxyaryl) aldimino Schiff bases
作者:Birgül Erk、Necla Gündüz
DOI:10.1016/s0020-1693(00)83941-9
日期:1990.1
Abstract Some of the stable chelate complexes of uranium(VI) were prepared with alkyl or aryl (R) bridged o,o′-dihydroxyaryl Schiffbases of HOC6H4CHNRNCHC6H4OH and HOC10H6CHNRNCHC10H6OH (R: (CH2)n; (C2H4NH)n(C2H4); (C6H4CH2C6H4; o, m, p-C6H4). Their structures were determined by UV, IR and elemental analyses. It is evident that strong ligand-ion interaction usually caused the polymeric