共查询到10条相似文献,搜索用时 468 毫秒
1.
A series of Cp2Ti(SB)Cl complexes, whereSB is the anion of bidentate Schiff bases derived from salicylaldehyde and different primary aminesviz o-anisidine,m-anisidine,o-phenetidine,o-chloroaniline,m-chloroaniline,m-nitroaniline, α-naphthylamine and benzylamine, have been synthesised by the reaction of dichloro-bis(cyclopentadienyl) titanium(IV),
Cp2TiCl2, and bidentate Schiff base (sbh) in a 1:1 molar ratio in refluxingthf in the presence of triethylamine. The new derivatives have been characterised on the basis of their elemental analyses, conductance
measurements and spectral (IR,1Hnmr and electronic) studies 相似文献
2.
The organomercury compounds HgR2 (R = 2-Cl,6-FC6H3, 2,6-F2C6H3, 2,3,6-F3C6H2, m-HC6F4, p-HC6F4, or C6F5) and RHg(O2CR) (R = 2-Cl,6-C6H3, 2,6-F2C6H3 or 2,3,6-F3C6H2) have been obtained in moderate – good and low yields respectively from decarboxylation reactions of the corresponding mercury(II) fluorobenzoates in boiling pyridine. By contrast, mercury(II) 2,3,4-5-tetrafluorobenzoate gave a low yield of CO2, a trace of Hg(o-HC6F4)2 and a very low yield of o-HC6F4Hg(O2CC6F4H-o). The 199Hg NMR spectra of the diorganomercurials (R = 2-Cl,6-FC6H3, 2,6-F2C6H3, 2,3,6-F3C6H2, 2,4,6-F3C6H2, 2,6-Cl2C6H3, o-HC6F4, m-HC6F4, p-HC6F4 or C6F5) are discussed. 相似文献
3.
Summary Reactions of hybrid oxygen-arsenic ligands:o-R2As-C6H4CO2H (R = Me, Et, C6H11, Ph andp-tolyl) with CrO3 and of their sodium salts withtrans-[CrCl2(H2O)4]Cl·2H2O in a 31 molar ratio yield three types of oxo/hydroxo bridged complexes:a. CrO(o-R2AsC6H4CO2)nH2O (R=Me, n=1.5 or 2.5; R=Et, n=1 or 1.5; R=C6H11, n=1 or 3; R=p-tolyl, n=4),b. Cr(o-Ph2AsC6H4CO2)2(OH)2.5 H2O andc. Cr(o-R2AsC6H4CO2)(OH)2nH2O (R=Ph, n=1; R=p-tolyl, n=0.5). Their i.r. data favour symmetrical chelation of the carboxylate ion, with the metal ion leaving the arsenic(III) uncoordinated. Suitable dimeric, trimeric and tetrameric structures have been assigned for (i) Typea (R=C6H11, n=1), (ii) Typea (R=p-tolyl, n=4) and (iii) typea. (R= Et, n=1), Typeb. and Typec. (R=p-tolyl, n=0.5) complexes respectively on the basis of solution spectra and experimental molecular weights and eff values. Calculated ligand field parameters (10 Dq and B) for all the complexes indicate covalent interaction between the metal ion and the ligands. 相似文献
4.
Dapeng Zhao Dr. Wei Gao Dr. Ying Mu Prof. Ling Ye 《Chemistry (Weinheim an der Bergstrasse, Germany)》2010,16(14):4394-4401
A series of new titanium(IV) complexes with o‐metalated arylimine and/or cis‐9,10‐dihydrophenanthrenediamide ligands, [o‐C6H4(CH?NR)TiCl3] (R=2,6‐iPr2C6H3 ( 3 a ), 2,6‐Me2C6H3 ( 3 b ), tBu ( 3 c )), [cis‐9,10‐PhenH2(NR)2TiCl2] (PhenH2=9,10‐dihydrophenanthrene; R=2,6‐iPr2C6H3 ( 4 a ), 2,6‐Me2C6H3 ( 4 b ), tBu ( 4 c )), [{cis‐9,10‐PhenH2(NR)2}{o‐C6H4(HC?NR)}TiCl] (R=2,6‐iPr2C6H3 ( 5 a ), 2,6‐Me2C6H3 ( 5 b ), tBu ( 5 c )), have been synthesised from the reactions of TiCl4 with o‐C6H4(CH?NR)Li (R=2,6‐iPr2C6H3, 2,6‐Me2C6H3, tBu). Complexes 4 and 5 were formed unexpectedly from the reactions of TiCl4 with two or three equivalents of the corresponding o‐C6H4(CH?NR)Li followed by sequential intramolecular C? C bond‐forming reductive elimination and oxidative coupling reactions. Attempts to isolate the intermediates, [{o‐C6H4(CH?NR)}2TiCl2] ( 2 ), were unsuccessful. All complexes were characterised by 1H and 13C NMR spectroscopy, and the molecular structures of 3 a , 4 a – c , 5 a , and 5 c were determined by X‐ray crystallography. 相似文献
5.
Summary Reactions of hybrid oxygen-arsenic ligandso-R2As-C6H4CO2H (R=Et, C6H11 andp-tolyl) (2 mols) with M(OAc)2 · 4H2O (M=Co or Ni) (1 mol) yield Co(o-R2As-C6H4CO2)2 (R=Et orp-tolyl) and Ni(o-R2AsC6H4CO2)2 · nH2O (R=Et, n=0.5; R=C6H11, n=2) complexes. The electronic spectra and magnetic susceptibilities at different temperatures are compatible with tetrahedral and octahedral stereochemistries for cobalt(II) and nickel(II) complexes respectively. The ligand field parameters (10 Dq and B) have also been calculated and interpreted in terms of metal-ligand bond types. 相似文献
6.
Dr. Yongguang Li Dr. Le Zhao Dr. Anthony Yiu‐Yan Tam Dr. Keith Man‐Chung Wong Prof. Dr. Lixin Wu Prof. Dr. Vivian Wing‐Wah Yam 《Chemistry (Weinheim an der Bergstrasse, Germany)》2013,19(43):14496-14505
A new series of platinum(II) complexes with tridentate ligands 2,6‐bis(1‐alkyl‐1,2,3‐triazol‐4‐yl)pyridine and 2,6‐bis(1‐aryl‐1,2,3‐triazol‐4‐yl)pyridine (N7R), [Pt(N7R)Cl]X ( 1 – 7 ) and [Pt(N7R)(C?CR′)]X ( 8 – 17 ; R=n‐C4H9, n‐C8H17, n‐C12H25, n‐C14H29, n‐C18H37, C6H5, and CH2‐C6H5; R′=C6H5, C6H4‐CH3‐p, C6H4‐CF3‐p, C6H4‐N(CH3)2‐p, and cholesteryl 2‐propyn‐1‐yl carbonate; X=OTf?, PF6?, and Cl?), has been synthesized and characterized. Their electrochemical and photophysical properties have also been studied. Two amphiphilic platinum(II)? 2,6‐bis(1‐dodecyl‐1,2,3‐triazol‐4‐yl)pyridine complexes ( 3‐Cl and 8 ) were found to form stable and reproducible Langmuir–Blodgett (LB) films at the air/water interface. These LB films were characterized by the study of their surface‐pressure–molecular‐area (π–A) isotherms, XRD, and IR and polarized‐IR spectroscopy. 相似文献
7.
New liquid-crystalline heteropolynuclear complexes L2M (M=Cu2+ (2a), Pd2+ (2b)) were synthesized by the reactions of C5H5FeC5H4−C6H4NH−C2H2−(CO)−C6H4OC12H25 (1, LH) with copper(ii) and palladium(ii) acetates. Compound2b was found to possess monotropic nematic and smectic phases;2a exhibits the monotropic nematic phase and a phenomenon of “double melting”. The compositions and structures of compounds1 and2a,b were established by elemental analysis,1H and13C NMR, ESR, and IR spectroscopy.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 381–383, February, 1999. 相似文献
8.
Selenoquinones Stabilized by Ruthenium(II) Arene Complexes: Synthesis,Structure, and Cytotoxicity
下载免费PDF全文
![点击此处可从《Chemistry (Weinheim an der Bergstrasse, Germany)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Dr. Julien Dubarle‐Offner Catherine M. Clavel Geoffrey Gontard Prof. Paul J. Dyson Dr. Hani Amouri 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(19):5795-5801
A new series of monoselenoquinone and diselenoquinone π complexes, [(η6‐p‐cymene)Ru(η4‐C6R4SeE)] (R=H, E=Se ( 6 ); R=CH3, E=Se ( 7 ); R=H, E=O ( 8 )), as well as selenolate π complexes [(η6‐p‐cymene)Ru(η5‐C6H3R2Se)][SbF6] (R=H ( 9 ); R=CH3 ( 10 )), stabilized by arene ruthenium moieties were prepared in good yields through nucleophilic substitution reactions from dichlorinated‐arene and hydroxymonochlorinated‐arene ruthenium complexes [(η6‐p‐cymene)Ru(C6R4XCl)][SbF6]2 (R=H, X=Cl ( 1 ); R=CH3, X=Cl ( 2 ); R=H, X=OH ( 3 )) as well as the monochlorinated π complexes [(η6‐p‐cymene)Ru(η5‐C6H3R2Cl)][SbF6]2 (R=H ( 4 ); R=CH3 ( 5 )). The X‐ray crystallographic structures of two of the compounds, [(η6‐p‐cymene)Ru(η4‐C6Me4Se2)] ( 7 ) and [(η6‐p‐cymene)Ru(η4‐C6H4SeO)] ( 8 ), were determined. The structures confirm the identity of the target compounds and ascertain the coordination mode of these unprecedented ruthenium π complexes of selenoquinones. Furthermore, these new compounds display relevant cytotoxic properties towards human ovarian cancer cells. 相似文献
9.
Kirill V. Tretyakov Nino G. Todua Roman S. Borisov Vladimir G. Zaikin Stephen E. Stein Anzor I. Mikaia 《Rapid communications in mass spectrometry : RCM》2010,24(17):2529-2532
A new kind of ‘para‐effect’ under electron ionization (EI) conditions has been discovered for a series of bis(perfluoroacyl) derivatives of o‐, m‐ and p‐phenylenediamines, ‐hydroxybenzeneamines and ‐mercaptobenzeneamines of a common structure RCOX–C6H4–NHCOR (X = NH, S, O; R = CF3, C2F5, C3F7). Only the para‐isomers showed successive loss of a radical RCO? and a molecule RCN, leading to very intense peaks in the EI spectra. The composition and the origin of the [M–COR–NCR]+ ions were confirmed by exact mass measurements and linked scan experiments. The proposed mechanism of their formation takes into account likely para‐quinoid structures of the precursor ions. A similar rearrangement has not been observed for para‐isomers in the series of bis(perfluoroacyl) derivatives of benzenediols, mercaptophenols and dimercaptobenzenes. Published in 2010 by John Wiley & Sons, Ltd. 相似文献
10.
Some new β-diketone derivatives of boron having the general formula B2O(OAc)4?n[OC(R) CH3]n (where n = 1 or 2; R = CH3, C2H5, C6H5 and p-ClC6H4) have been synthesised by the reactions of oxy-bis(diacetatoborane) and substituted pyrazolones, such as 4-acyl-3-methyl-1-phenyl-2-pyrazolin-5-ones (acyl = acetyl, propionyl, benzoyl and p-chlorobenzoyl) in dry toluene solution in 1:1 and 1:2 molar ratios. These derivatives have been characterised by elemental analysis, molecular weight measurements. Structures have been proposed on the basis of chemical reactions, IR, 1H and 11B NMR spectral studies.In the derivatives B2O(OAc)3[OC(R) CH3] two of the three acetate groups are unidentate and the third is bridged between two boron atoms along with BOB linkage. Whereas the derivatives B2O(OAc)2[OC(R) CH3]2 are the mixture of geometrical isomers. 相似文献