THE CRYSTAL STRUCTURE OF COMPLEX OF DIBENZO-30-CROWN-10 (DB-30C-10) WITH THALLIUM(I) PERCHLORATE

来源 :结构化学 | 被引量 : 0次 | 上传用户:repopw
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 complex T1[DB-30C-10]ClO4(Mr=840. 45) crystallizes in the monoclinic,space group P21/n with a=12. 383(3),b= 18. 785(6),c= 14. 081(2) A and B=100.56(2) , Z=4, V= 3220.0A,Dx=1.734g/cm3,F(000) = 1672. The final refinement converged with R=0. 045 and Rw=0.053 for 2218 observed independent reflections. Ten oxygen atoms coordinated to thallium (I) are arranged in a hexadecahe-dron with quasi-D2h symmetry. Bond lengths and angles in the complexed and free crown-ethers are essentially the same but their conformations are different. Four of the C-O-C-C angles in (DB-30C-10) change from trans in the free to gauche in the complex;the remaining torsion angles are of the same type in both forms. The title complex T1 [DB-30C-10] ClO4 (Mr = 840.45) crystallizes in the monoclinic space group P21 / n with a = 12.3383 (3), b = 14. 081 (2) A and B = 100.56 (2), Z = 4, V = 3220.0A, Dx = 1.734g / cm3, F (000) = 1672. The final refinement converged with R = 0. 045 and Rw = 0.053 for 2218 observed independent reflections. Ten oxygen atoms coordinated to thallium (I) are arranged in a hexadecahe-dron with quasi-D2h symmetry. Bond lengths and angles in the complexed and free crown-ethers are essentially the same but their conformations are different. Four of the COCC angles in (DB-30C-10) change from trans in the free to gauche in the complex; the remaining torsion angles are the same type in both forms.
其他文献
<正>今年是陈云诞辰111周年,从时空角度讲,他离我们越来越远了,但是站在历史和现实的交汇点,我深深地感到,陈云的宝贵思想堪称经典。今天,我从实事求是的角度谈一谈陈云的担
Ⅰ.钻模加工产品零件图精度的要求——产品零件是X51K立铣床的立铣头壳(图1): 1.镗两个φ135A孔: ①同心度允许误差0.02,保证主轴同心; ②与A面不平行度允许误差0.01; ③刮两
标题化台物[(i-PrO)_2P(S)NHCONHCO—Cl,M.P.166.0℃]的晶体结构已被测定,该化合物晶体属三斜晶系,PI空间群,晶胞参数为a=9.269(7),b=14.036(2),c=15.911(2);a=106.63(1)°,
《贺氏三姐妹》一书(东方出版 社,2003年3月)在写到大革命时 期有一段话:“且说永新(县)这一 仗是在田溪区域间打的,只因当地 群众基础较好,乃至草木皆兵。战 斗只进行了半天
大学生在全国大学英语四、六级统考中,最感困难的是阅读理解。这与传统的教学模式(即读音→词汇→语法→句意理解)不无关系。这种教学重视词汇和语法的学习,却忽视了对文章整体的
据不完全统计,全国先后有14个省份的部分县市实行了公车改革试点,尽管如此,整体来看公车改革并不尽如人意,公车数量和购置费用仍呈增长态势。此次,《党政机关厉行节约反对浪
我厂铸造车间工作刘贵臣,在增产节约运动中,创造小勺自动挡渣板,提高了浇注效率,并能保证渣滓不带入铸件,提高了铸件的质量。小勺自动挡渣板,就是在倒铁水小勺的两侧,按上两
在安装梁与柱焊接装置的炼式翻转机时,需要数根长约7公尺,直径00公厘的传动轴。但厂内现有材料,长度仅900公厘到1700公厘。因此,只能把数根短轴用焊接的方法接成长轴。焊前,
一、我廠对锻件電磁探傷的情况机械構件中如存在有裂紋,卽割断了金屬基体的连貫性。不論它的形狀大小、数量多寡、背境深淺、以及所在位置如何,都会削弱金屬的强度極限,耐疲
我厂制造细拉簧的方法,原来是用手工绕制的。效率很低。以后改为用手电钻绕制,提高效率10倍。如附图所示,在手电钻上装一根绕簧心杆,钢丝的一端通过虎钳钳口两块夹紧木垫,另