【摘 要】
：
The crystal structure of the title compound (C20H20O4, Mr = 324.36) has been determined by single-crystal X-ray diffraction. The crystal is of orthorhombic, sp
论文部分内容阅读
The crystal structure of the title compound (C20H20O4, Mr = 324.36) has been determined by single-crystal X-ray diffraction. The crystal is of orthorhombic, space group Pbcn with a = 15.823(2), b = 18.002(3), c = 11.674(2) ?, V = 3325.34(67) ?3, Dc = 1.296 g/cm3, μ = 0.090 mm-1, Z = 8, F(000) = 1376, the final R = 0.0421 and wR = 0.0996. In the molecular structure, the pyran ring is of boat conformation, and the two six-membered rings fused with it adopt twisting-boat conformations.
The crystal structure of the title compound (C20H20O4, Mr = 324.36) has been determined by single-crystal X-ray diffraction. The crystal is of orthorhombic, space group Pbcn with a = 15.823 (2), b = 18.002 the final R = 0.0421 and wR = (2), V = 3325.34 (67) 3, Dc = 1.296 g / cm3, μ = 0.090 mm-1, Z = 8, F 0.0996. In the molecular structure, the pyran ring is of boat conformation, and the two six-membered rings fused with it adopt twisting-boat conformations.
其他文献
6．7亿引来外资6．7亿美元在温州,招商引资有多难?难于上青天么?在温州,民间资本十分充裕,还有必要招商引资么?温州的招商引资,多少年来,一直困扰着人们手脚的,就是这么一些“糊
目的分析广州市产科医疗资源现状及公平性,为改进产科医疗资源配置提供依据。方法采用《广州市产科医院现状调查表》调查广州市产科医院2010、2014年资源配置及工作量,采用洛
晋政发[2011]10号各市、县人民政府,省人民政府各委、厅,各直属机构:防震减灾工作事关人民群众生命财产安全和经济社会发展全局,省委、省人民政府对此高度重视。近年来,通过
Supercritical carbon dioxide(SC-CO_2) is considered in green chemistry as a substitute for conventional solvents in chemical reactions due to its environmentall
笔者1999年8月配了一台机器:PⅢ450CPU、昆腾火球八代10.2G硬盘、华硕V3400TNT显卡(16MB显存)、华硕15G单键飞梭显示器、创新PC-WORKS2.1音箱、64MB PC-133原装樵风金条、多
Tribological properties of Meso-carbon Microbeads (MCMB) powders as a special addi-tive in pentaerythritol were investigated on an Optimal SRV tribotester at 3
Davidson and Clark’s equations for calculating the local spin of molecules were rewritten and simplified as matrices algebra. By applying our program, we calc
1.制造养分肥效多元活绿宝能充分利用微生物的作用机理为作物提供不同的氮、磷、钾营养元素;含有固氮功能的菌种能将空气中的氮气转化为作物可吸收的氮素营养,含有多种溶磷
Density functional theory (DFT) has been applied to study the enantioselective reduction of 3-morpholin-4-yl-1-phenyl-1-propanone with borane catalyzed by (S)-
(一)我的老家曾是一个纯粹意义上的乡村,除了几把钢锄,你找不到其他的工业产品。就是这些如老父亲一样默默无闻的钢锄们,一锄一个脚印地挖掘,才生产出我们兄妹几个读书的开