全文获取类型
收费全文 | 93篇 |
免费 | 2篇 |
专业分类
化学 | 58篇 |
晶体学 | 7篇 |
力学 | 1篇 |
综合类 | 2篇 |
物理学 | 27篇 |
出版年
2017年 | 1篇 |
2016年 | 1篇 |
2013年 | 5篇 |
2012年 | 3篇 |
2011年 | 2篇 |
2010年 | 2篇 |
2009年 | 2篇 |
2008年 | 2篇 |
2007年 | 5篇 |
2006年 | 3篇 |
2005年 | 4篇 |
2004年 | 5篇 |
2003年 | 2篇 |
2002年 | 7篇 |
2001年 | 2篇 |
2000年 | 3篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 8篇 |
1993年 | 5篇 |
1992年 | 2篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 5篇 |
1988年 | 3篇 |
1987年 | 2篇 |
1985年 | 3篇 |
1982年 | 3篇 |
1980年 | 1篇 |
1977年 | 1篇 |
1976年 | 2篇 |
1974年 | 1篇 |
排序方式: 共有95条查询结果,搜索用时 859 毫秒
81.
82.
P. N. Bourosh O. A. Bologa M. Gdaniec Yu. A. Simonov N. V. Gerbeleu 《Journal of Structural Chemistry》2005,46(3):488-493
A new Co(III) complex of 1,2-cyclohexanedionedioxime and thiocarbamide with an SO 4 2? anion and solvation water molecules in the outer sphere has been synthesized and its structure has been defined. Orthorhombic crystals, a = 11.659(2) Å, b = 26.448(5) Å, c = 30.142(6) Å, V = 9295(3) Å 3, Z = 8, dcalc = 1.599 g/cm3, space group Pbca; final R index is 0.0578 for 8221 reflections with I > 2σ(I). In the octahedral Co(III) complex, two 1,2-cyclohexanedionedioxime residues lie in the equatorial plane, while two thiocarbamide molecules are in the axial plane. Intramolecular bonds: N-H…O and O-H…O type hydrogen bonds and π-π interactions that stabilize the complex cations. In crystal, the components are linked by N-H…O and O-H…O hydrogen bonds into a 3D framework. 相似文献
83.
V. Kh. Kravtsov Yu. A. Simonov N. V. Gerbeleu O. A. Bologa V. I. Lozan T. I. Malinovskii 《Journal of Structural Chemistry》1994,35(3):412-415
Institute of Applied Physics, Academy of Sciences, Moldova Republic. Institute of Chemistry, Academy of Sciences, Moldova
Republic. Translated fromZhurnal Strukturnoi Khimii, Vol. 35, No. 3, pp. 154–158, May–June, 1994. 相似文献
84.
85.
86.
Dissociation Energy Computations for Saline Bonds Implied in Interactions Mediated by Peptidoglicans
Simona Muntean Ludovic Kurunczi Cristian Bologa Gheorghe Ilia Zeno Simon 《Macromolecular Symposia》2006,235(1):215-219
Summary: Dissociation energy and hydration energy calculations, in water solution, are presented for saline bonds mediated by Ca2+ and Mg2+ ions with Brőnstedt type bases ( COO , OSO3 , OH). A computationally intensive method, Polarisable Continuum Model (PCM) using 6-31G* basis set, was applied. Hydration energies were computed by various methods, as well as dissociation energies of some L2M complexes. L2Ca complexes result as more stable against dissociation than L2Mg complexes. Hydration energy calculation results, for some of the methods, here used, seem rather reliable as compared to experimental results. 相似文献
87.
88.
Simonov Yu. A. Gerbeleu N. V. Gdaniec M. Bourosh P. N. Koropchanu E. B. Bologa O. A. 《Russian Journal of Coordination Chemistry》2001,27(5):341-352
Compounds that form in the CoSiF6· 6H2O–NioxH2–A–water–alcohol system, where A is thiourea (Thio) or triphenylphosphine (PPh3) and NioxH2is 1,2-cyclohexanedione dioxime, were synthesized and characterized by X-ray diffraction analysis. Crystal structures of the [Co(NioxH)2(PPh3)2]SiF5and [Co(NioxH)2(Thio)2]2SiF6· 3H2O complexes were established. In octahedral Co(III) complexes, two radicals of 1,2-cyclohexanedione dioxime are bound by a hydrogen bond and are located in the equatorial plane. The intramolecular (– and H bonds) and intermolecular (C–H···F and H bonds) interactions in the crystal are discussed. 相似文献
89.
Koster S Duursma MC Boon JJ Nielen MW de Koster CG Heeren RM 《Journal of mass spectrometry : JMS》2000,35(6):750-759
In order to keep subscribers up-to-date with the latest developments in their field, John Wiley & Sons are providing a current awareness service in each issue of the journal. The bibliography contains newly published material in the field of mass spectrometry. Each bibliography is divided into 11 sections: 1 Books, Reviews & Symposia; 2 Instrumental Techniques & Methods; 3 Gas Phase Ion Chemistry; 4 Biology/Biochemistry: Amino Acids, Peptides & Proteins; Carbohydrates; Lipids; Nucleic Acids; 5 Pharmacology/Toxicology; 6 Natural Products; 7 Analysis of Organic Compounds; 8 Analysis of Inorganics/Organometallics; 9 Surface Analysis; 10 Environmental Analysis; 11 Elemental Analysis. Within each section, articles are listed in alphabetical order with respect to author (5 Weeks journals - Search completed at 22nd. Mar 2000) 相似文献
90.
S. T. Malinovskii É. B. Coropceanu O. A. Bologa A. P. Rija M. Gdaniec 《Journal of Structural Chemistry》2007,48(3):506-512
Two novel coordination compounds of thiourea-containing trans-octahedral trans-dioximates of trivalent cobalt [Co(DH)2(Tu)2]2[ZrF6]·H2O and [Co(NioxH)2(Tu)2]2[ZrF6]·3H2O, where DH? is the monoanion of dimethylglyoxime, NioxH? is the monoanion of 1,2-cyclohexanone dioxime, Tu is thiourea, are prepared and characterized by single crystal X-ray diffraction. The structures manifest pairwise an almost parallel and perpendicular arrangement of the Tu fragment in respect to the equatorial plane of the coordination core, accompanied by a development of non-bonding intramolecular π-π-and N-H...O-interactions affecting the structures of the compounds in question. The formation of the crystal structures is primarily governed by outer-sphere [ZrF6]2? anions and crystallization water molecules. 相似文献