Isolation and Crystal Structure of 4β,6α,9α-Trimethy-2-carboxyltricyclo[6.3.0.0~(4,5)]undec-2-ene

来源 :结构化学 | 被引量 : 0次 | 上传用户:fencer_2
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The title compound,4β,6α,9α-trimethy-2-carboxyltricyclo[6.3.0.0(4,5)]undec-2-ene,is a sesquiterpene which was first isolated from Ligularia caloxantha and characterized by MS and NMR.In addition,the structure was determined by X-ray single-crystal diffraction.It crystallizes in orthorhombic,space group P212121 with a = 8.197(2),b = 14.876(3),c = 22.281(6) ,α = β = γ = 90o,V = 2716.9(11) 3,Z = 8,C15H22O2,Mr = 234.34,Dc = 1.146 g/cm3,μ(MoKα) = 0.074 mm-1,F(000) = 1024,the final R = 0.0384 and wR = 0.0856 for 6200 independent reflections(Rint = 0.066) and 2538 observed ones(I > 2σ(I)).In the molecule,there are three fused five-membered rings;while in this crystal form,the asymmetric unit contains two molecules of the same hand and they are linked together by two intermolecular O-H···O hydrogen bonds to form a dimer. The title compound, 4β, 6α, 9α-trimethy-2-carboxyltricyclo [6.3.0.0 (4,5)] undec-2-ene, is a sesquiterpene which was first isolated from Ligularia caloxantha and characterized by MS and NMR Addition , the structure was determined by X-ray single-crystal diffraction. It crystallizes in orthorhombic space group P212121 with a = 8.197 (2), b = 14.876 (3), c = 22.281 = 90o, V = 2716.9 (11) 3, Z = 8, C15H22O2, Mr = 234.34, Dc = 1.146 g / cm3, μ (MoKα) = 0.074 mm-1, 0.0384 and wR = 0.0856 for 6200 independent reflections (Rint = 0.066) and 2538 observed ones (I> 2σ (I)). In the molecule, there are three fused five-membered rings; while in this crystal form, the asymmetric unit contains two molecules of the same hand and they are linked together by two intermolecular OH ··· O hydrogen bonds to form a dimer.
其他文献
原江苏省委常委、组织部部长徐国健的贪污受贿丑闻东窗事发后,在全国引起不小的震动。人们深感意外的是,一向低调谨慎的人怎么也会“出事”呢?徐国健案件所牵涉到的人比较少,
2006年5月28日,中国石油和化学工业协会在北京人民大会堂举行了2006中国石油和化工民营企业发展会议。全国政协常委、中国石油和化学工业协会会长李勇武,国家发改委中小企业
英语是一门实践性很强的工具学科,运用英语进行交际是其实践性的主要表现,因此,在中学英语教学中必须为学生提供充分的运用英语口语进行交际实践的机会,使学生在课堂中形成“
目的 :探讨 2型糖尿病 (DM)患者血清Ⅳ型胶原 (CⅣ )、尿Tamm -Horsfall蛋白 (THP)、白蛋白(Alb)的变化与糖尿病视网膜病变 (DR)的关系。方法 :采用酶联免疫法及放射免疫分析
从副省长“退到”国信老总王钟麓于1930年出生于浙江萧山。萧山原系杭州市下属的一个县级市,现划入杭州市区,称萧山区。萧山以经济实力雄厚而在全国颇负盛名,曾多次名列全国
介绍了一种基于正硅酸乙酯(TEOS)的疏水SiO2气凝胶的制备及其表征方法。结果表明,最后制备的气凝胶具有一定塑性,可进行机械加工。 The preparation and characterization o
介绍一种利用8098单片机内的A/D转换器和监视跟踪定时器,加上相应的程序设计,提高8098单片机系统抗干扰能力的方法,在实际应用中取得了满意的效果 This paper introduces a method of usin
项目简介“地理教师卓越发展”项目,是核心期刊《中学地理教学参考》面向全国优秀地理教师,精心打造的学习交流、研学实践和专业出版的高端服务平台。项目依靠本刊优质而丰富
当代著名物理学丁肇中教授曾有肺腑之言:“不要教死知识,要授之以方法,打开学生的思路,培养他们的自学能力。”作为一名教师,我常思忖这句话的分量,尤其是在大力倡导素质教育