Proceedings of the Indian Academy of Sciences - Chemical Sciences最新文献_第2页

Effect of non-leaving ligand environment on aqua ligand substitution in chromium(III) schiff-base complexes 非离去配体环境对铬(III)席夫碱配合物中水合配体取代的影响

Proceedings of the Indian Academy of Sciences - Chemical Sciences Pub Date : 1996-06-01 DOI: 10.1007/BF02870092

M. Kanthimathi, B. Nair, T. Ramasami

引用次数: 0

Reactions of nitrilotriacetic acid with copper(II) and nickel(II) disphenolate diamide complexes in alkaline media — A kinetic approach 硝基三乙酸与铜(II)和镍(II)二酚二胺配合物在碱性介质中的反应动力学方法

Proceedings of the Indian Academy of Sciences - Chemical Sciences Pub Date : 1996-06-01 DOI: 10.1007/BF02870094

S. D. Bhattamisra, S. Tripathy

引用次数: 0

Bi- and trinuclear complexes of molybdenum(I) incorporating ferrocenyl unit as a redox spectator 含二茂铁基单位的钼(I)双核和三核配合物作为氧化还原观察者

Proceedings of the Indian Academy of Sciences - Chemical Sciences Pub Date : 1996-06-01 DOI: 10.1007/BF02870086

M. Bhadbhade, Amitava Das

引用次数: 0

Synthesis, characterization and nuclease activity of [Ru(phen)2(DPNQP)]2+ where phen=1,10-phenanthroline and DPNQP=dipyrido[3,2-a: 2′,3′-c] 1,4-naphthoquino [2,3-f] phenazine [Ru(phen)2(DPNQP)]2+ (phen =1,10-菲罗啉和DPNQP=双吡啶[3,2-a: 2 '，3 ' -c] 1,4-萘醌[2,3-f]菲那嗪)的合成、表征和核酸酶活性

Proceedings of the Indian Academy of Sciences - Chemical Sciences Pub Date : 1996-06-01 DOI: 10.1007/BF02870083

S. Arounaguiri, A. Dattagupta, B. Maiya

引用次数: 0

Reduction of higher-valent manganese complexes with different combinations of valency states and nuclearity 还原具有不同价态和核组合的高价锰配合物

Proceedings of the Indian Academy of Sciences - Chemical Sciences Pub Date : 1996-06-01 DOI: 10.1007/BF02870093

S. Kundu, Beauty Chaudhury, Biswapriya Mondal, R. Das, A. Bhattacharya, A. Mondal, R. Banerjee

引用次数: 0

Recent developments in organometallic chemistry of lanthanides 镧系元素有机金属化学的新进展

Proceedings of the Indian Academy of Sciences - Chemical Sciences Pub Date : 1996-06-01 DOI: 10.1007/BF02870088

S. Swamy

引用次数: 0

Do the substituents on the phenanthroline ligands of copper(II) complexes induce conformational heterogeneity in B-DNA? 铜(II)配合物的邻菲罗啉配体上的取代基是否诱导B-DNA的构象异质性?

Proceedings of the Indian Academy of Sciences - Chemical Sciences Pub Date : 1996-06-01 DOI: 10.1007/BF02870073

S. Mahadevan, M. Palaniandavar

引用次数: 0

Ligand control on the synthesis and redox aspects of mononuclear manganese-(III) and -(IV) complexes with tridentate ONS-coordination 配体对具有三齿ons配位的单核锰-(III)和-(IV)配合物合成和氧化还原方面的控制

Proceedings of the Indian Academy of Sciences - Chemical Sciences Pub Date : 1996-06-01 DOI: 10.1039/DT9940002799

R. Mukhopadhyay, Samiran Bhattacharjee, R. Bhattacharyya

{"title":"Ligand control on the synthesis and redox aspects of mononuclear manganese-(III) and -(IV) complexes with tridentate ONS-coordination","authors":"R. Mukhopadhyay, Samiran Bhattacharjee, R. Bhattacharyya","doi":"10.1039/DT9940002799","DOIUrl":"https://doi.org/10.1039/DT9940002799","url":null,"abstract":"MnCl2·4H2O reacts with benzohydroxamic acid (BHAH2) in aqueous/non-aqueous solution (alkaline) forming manganese(IV) complexes of the type (PPh4)2[Mn(BHA)3]·3H2O. Its IR data suggest the hydroximato mode of coordination (O, O). This complex in frozen solution exhibits axial spectra with strong zero field splitting giving rise to ag≈4 signal which is more intense than that forg≈2. The solid, however, shows rhombic spectra. A probable reason for this difference is assigned. Trifunctional (ONS) Schiff bases H2L1 and H2L2 (5-R-salicylaldehyde thiosemicarbazone and 5-R-salicyl aldehyde-4-phenyl thiosemicarbazone, respectively; R=H, Me or Br) furnish Mn(IV) complexes of the type [MnL2](L=L1 or L2), whereas H2L3 and H2L4 (H2L3=S-methyl 3-(5-R-2-hydroxyphenyl) methylene dithiocarbazate; H2L4=S-benzyl 3-(5-R-2-hydroxyphenyl) methylene dithiocarbazate; R=H, Me or Br) afford manganese(III) complexes of the type [MnL(O2CMe)] or [MnL(acac)] (acac=acetylacetonate, L=L3 or L4), when treated with MnII (O2CMe)2·4H2O or [MnIII(acac)3] in ethanol medium in air. The EPR spectra of the manganese(IV) complexes in frozen dimethyl formamide (dmf)-methanol solution show weak and strong signals at 〈g〉≈4·0 and ≈2·0 respectively, implying a small zero field splitting. The 〈g〉≈2·0 shows hyperfine (55Mn) as well as forbidden lines. Cyclic voltammograms of these complexes scanned in DMF show reversible and quasi-reversible MnIV-MnIII couple, theE2980 values of which are significantly affected by the electronic effects of the R-substituents in the salicyl phenyl ring and those attached to the carbon atom bound to the thiolate functionality of the ligands. The HammettσP values of the R-substituents are linearly correlated with theE2980 values.","PeriodicalId":20563,"journal":{"name":"Proceedings of the Indian Academy of Sciences - Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85853406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Regioselective oxidation of cholesterol and related substrates with iodosyl benzene catalyzed by manganese(III) picketfence porphyrins in phospholipid vesicle 磷脂囊泡中锰(III)尖栅栏卟啉催化碘基苯对胆固醇及相关底物的区域选择性氧化

Proceedings of the Indian Academy of Sciences - Chemical Sciences Pub Date : 1996-06-01 DOI: 10.1007/BF02870072

S. M. Chauhan, T. K. Sharma

引用次数: 0

Cytotoxic properties of metal-quinone complexes: Role of redox cycling in the toxicities of iron(II) and iron(III) complexes of 2- and 5-hydroxy-1,4-naphthoquinones to isolated rat hepatocytes 金属-醌复合物的细胞毒性:氧化还原循环在2-和5-羟基-1,4-萘醌的铁(II)和铁(III)复合物对分离大鼠肝细胞的毒性中的作用

Proceedings of the Indian Academy of Sciences - Chemical Sciences Pub Date : 1996-06-01 DOI: 10.1007/BF02870082

A. Kumbhar, P. Kulkarni, S. Padhye

引用次数: 0