全文获取类型
收费全文 | 97篇 |
免费 | 0篇 |
专业分类
化学 | 97篇 |
出版年
2017年 | 1篇 |
2016年 | 4篇 |
2015年 | 2篇 |
2014年 | 3篇 |
2013年 | 11篇 |
2012年 | 3篇 |
2011年 | 5篇 |
2010年 | 6篇 |
2009年 | 1篇 |
2008年 | 5篇 |
2007年 | 2篇 |
2006年 | 4篇 |
2005年 | 4篇 |
2004年 | 6篇 |
2003年 | 8篇 |
2002年 | 5篇 |
2001年 | 2篇 |
1998年 | 1篇 |
1995年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 3篇 |
1989年 | 1篇 |
1979年 | 1篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1972年 | 4篇 |
1971年 | 2篇 |
1970年 | 3篇 |
1969年 | 1篇 |
1967年 | 2篇 |
排序方式: 共有97条查询结果,搜索用时 453 毫秒
1.
2.
Mishina V. Yu. Abrashina I. V. Teleshev A. T. Vasyanina L. K. Nifant'ev E. E. 《Russian Journal of Organic Chemistry》2002,38(7):977-981
Phosphorous triamides react with aliphatic diols and dibasic phenols: 1,6-hexanediol, 2,2'-(4-hydroxyphenyl)propane, 1,4-hydroquinone, and 4,4'-dihydroxybiphenyl in the temperature range 80-110°C in diethylene glycol dimethyl ether or without a solvent to afford phosphorus-containing regular high-molecular products having an O2P(NR2) moiety in the monomeric unit. The resulting poly(phosphoramidites) are capable of swelling in organic solvents, and they can be used as macroligands in the catalytic hydrogenation of styrene over rhodium(I) complexes. 相似文献
3.
4.
5.
Ruzaeva M. I. Kukhareva T. S. Nifant'ev E. E. Vasyanina L. K. 《Russian Journal of General Chemistry》2002,72(9):1343-1345
The reactions of 1,1'-spirobi(5,6-dihydroxy-3,3-dimethylindane) and 1,2,4,5-tetrahydroxybenzene with 2-chloro-1,2,3-dioxaphosphorinanes of various structure were used to obtain tetraphosphorylated systems. Investigation of the chemical properties of the products was initiated. Basing on 1,1'-spirobi(3,3-dimethylindane-5,6-diyl) tetra(2,2-dimethylpropanediyl phosphite), a Pt(II) chelate was synthesized. 相似文献
6.
Sergei Yu Burmistrov Mikhail K. Gratchev Galina I. Kurochkina Larisa K. Vasyanina Edward E. Nifantyev 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4)
Abstract The effect of acid-base properties of amines hydrochlorides (AH) on their catalytic activity in methanolysis of P(III)-N-ethylaniline has been studied. The analysis of Bronsted correlation equation was indicative of general acid catalysis and it was thus confirmed, that general regularities had place during alcoholysis of P(III)-amines under catalysis with AH. In addition, the increasing of alcohol polarity leads to the increasing of proton transfer degree (α) from acid catalysts to phospho(III)amine substrate and to the increasing of the positive charge at the phosphorus in the transition state. Besides, the comparison of α values indicates that in more polar methanol (in comparison with tbutanol) the catalysis is more sensitive to the acidity change of used catalysts. 相似文献
7.
Cyclophosphorylation of β-cyclodextrin silyl derivatives with trivalent phosphorus acids dichlorides
M. K. Grachev A. A. Charaev G. I. Kurochkina N. O. Sobolev L. K. Vasyanina E. E. Nifant’ev 《Russian Journal of General Chemistry》2010,80(10):1933-1936
A study of cyclophosphorylation with trivalent phosphorus acids dichlorides showed that the reaction, in contrast to a similar
phosphorylation with phosphorous acid di- and triamides is less effective, and in the case of phenylphosphonous dichloride
is accompanied by a noticeable desilylation. 相似文献
8.
E. E. Nifant’ev M. S. Krymchak T. S. Kukhareva L. K. Vasyanina M. V. Turbina 《Russian Journal of General Chemistry》2010,80(3):423-427
The possibility was demonstrated and conditions were developed of a directional phosphorylation of dihydroquercetin flavonoid
with phosphorous hexaethyltriamide. The chemical properties of the obtained compounds of trivalent phosphorus are currently
under investigation. 相似文献
9.
Conclusions The hydrolysis, alcoholysis, aminolysis, and acidolysis of 2-ethyl-1-butyl-5-oxo-1,2-azaphospholane proceeds with cleavage of the nitrogen-phosphorus bond.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2059–2064, September, 1972. 相似文献
10.
G. I. Kurochkina N. A. Kudryavtseva M. K. Grachev S. A. Lysenko L. K. Vasyanina E. E. Nifant’ev 《Russian Journal of General Chemistry》2007,77(3):442-449
A possibility of formation of various inclusion complexes and conjugates of β-cyclodextrin and its silyl derivatives with the medicine preparation “Ibuprofen” and its synthetic precursors in dependence of nature of solvent and size of cyclodextrin cavity is demonstrated. 相似文献