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Cis-C=C configuration on 2 position is easily isomerized to trans-form in environment according to literatures, but cycloproyl do it difficut relatively. So, replacement of 2,3- allyl unit by cyclopropyl group might give a practical method to get over the problem.

为解决脱落酸2位双键在环境中易光异构化为反式结构的问题,依据电子等排体原理,将2,3-位的烯丙型的结构改变为环丙型结构,将可能解决光异构化的问题。

The complexes were characterized by elemental analysis,UV,IR,TG,NMR and molar conductance measurements.Their formulas were in accordance with C34H32O8N2LnCl·nH2O or 〔(L4)2LnCl·nH2O,Ln=Nd,n=4;Ln=Pr,Yb,n=2;Ln=Sm,Eu,Dy,n=1〕.All the water molecules were uncoordinated.Dinuclear complexes were observed in the coordination environment.The coordination number of central ions was nine.

经元素分析、红外光谱、紫外光谱、核磁共振谱、质谱、摩尔电导、差热热重分析确证结构,其化学式为C34H32O8N2LnCl·nH2O,简写为:(L42LnCl·nH2O,Ln=Nd,n=4;Ln=Pr,Yb,n=2;Ln=Sm,Eu,Dy,n=1;该类配体是以酚氧原子、亚氨基的氮原子、桥联的羧基氧原子以及氯原子同稀土离子配位,形成了九配位的双核配合物。

And among them they noticed a beautiful, slim, talkative old man, with bright black eyes and snow-white hair — tall and straight and still with the figure of a youth, although the waiter told them with pride that the Conte was molto vecchio — would in fact be eightey in the following year.

在这些人之中,有一位英俊健谈的高个老人引起了他们的注意。他有一双乌黑的眼睛,头发雪白,高大挺直的身板,像年轻人一样。然而,餐厅的服务生却有些自豪地告诉他们,这位伯爵年事已高,来年就有八十高龄了。

Orthogonally linearly-polarized lasers and its new applications in precision measurement are presented, including: 1 orthogonally linearly-polarized lasers, 2 principle for laser nanometer ruler (displacement sensor based on the competition between two polarized lights of the frequency splitting lasers), 3 principle for phase retardation measurement using frequency splitting technology, 4 principle for phase retardation measurement based on laser feedback effects.

介绍了正交线偏振激光器及其在精密测量中的新应用,包括:1 正交偏振双频激光器,2 纳米激光测尺(基于频率分裂的激光器两偏振光竞争位移传感器)测量原理,3 直接利用波片形成频率分裂的波片位相延迟测量原理,4 激光回馈波片位相延迟测量原理。

The coordinated COD of 3 and 4 can be replaced by carbon monoxide to yield the corresponding dicarbonyl species [(C,N-pyN^C-R) M2]BF4 (14, M= Rh; 15, M= Ir). Ligand substitution of 11a by phosphines and azide causes the de-complexation of pyridinyl-nitrogen donor to generate the corresponding carbene rhodium complexes [(C-pyN^C-Mes)RhPR3] (17a, R = Ph, 17b, R = Et) and [RhN3] (19), respectively, indicating the labile nature of steric-hindered pyridinyl-nitrogen donor.

螯合错合物的吡啶配位,可以容易被σ-予体,如卤离子、叠氮阴离子、膦试剂,置换;但是铑与铱金属螫合物与π-酸试剂,如一氧化碳、异腈,则发生COD被置的产物14a与16;与三甲基亚磷酸酯反应时,COD及吡啶均会被取代而得到单芽的三铑-碳烯错合物18;双膦化合物则会取代铑金属上全部的配位基。

COOLANT LEVETL: In newer cars look at the level markings on the overflow tank next to the engine, With order cars wait until the engine is cool and remove the radiator cap.

冷却液位:如果是新车,只需查看发动机旁溢流箱上液位标志。如果是旧车等发动机冷却后,取下散热器盖(为安全起见,带上一双厚手套)。

It is also applicable to measure micro-pressure and negative pressure of neutral gases without danger of explosion in boiler draft equipments, which cause no erosive attack on copper alloy. In addition, it has a function of dual two-position adjustment, so as to realize position

YEJ-121型矩形接点膜盒压力表是适用于锅炉通风设备对铜合金不起腐蚀作用的和中性、无爆炸危险的气体的微压和负压进行测量并具有双二位调节的作用,以实现位式调节或超限报警作用。

Employing high-dilute method and 5-fold excess amine prepared two new "two-armed" acyclic diamine intermediates I_a and I_b, which are also intermediates of synthesizing microcyclic compounds, and eight aromatic Schiff bases, II_, were synthesized from reaction of I_a or I_b condensing with different aromatic aldehydes. Their composition and structure were characterized by Elemental analysis, IR, UV-Vis, LIF,~1HNMR and MS. The hydrogen bond interactions and MS fragmental patterns were also discussed.3. Several novel transition metal complexes using II_a as ligand were synthesized and identified by Elemental analysis, IR, UV-Vis,~1HNMR and molar conductivity.

1,采用高度稀释及胺过量五倍的方法合成了两个具有吡啶双酰胺臂的非环二胺Ⅰ_a和Ⅰ_b,并以它们为中间体进一步合成了八个芳香席夫碱Ⅱ_a-Ⅱ_h,通过元素分析及各种波谱测试鉴定了它们的组成与结构,对化合物的UV-Vis、LIF、IR、~1HNMR及MS进行了较为详细的讨论,还探讨了席夫碱的氢键相互作用及质谱裂解方式; 2,以席夫碱Ⅱ_a为配体合成了几个新型的过渡金属配合物,并通过元素分析、UV-Vis、IR、~1HNMR、摩尔电导及DTA—TG对其进行了表征,讨论了化合物的配位情况及配体在配位中的脱质子行为。

Yesterday afternoon, when her quiet again to head shape appeared at the scene and immediately brought us to this stage of unlimited memory, with only five months ago is not the same, and the quiet appearance together four leading Duyulu, Hou Yong, Liu Wei and Zhao Jun are getting to be the story of a head shaving needs five individuals stand together Lee immediately in their nose into a flash :: For this stage of the quiet without a dress, a black water mink fur shawls, two quite minority characteristics huge earrings, a loss of 10 cm high pine cake sandals, coupled with the incomparable brilliant smile, the character models look at the mood is exceptionally good.

昨天下午,当女主角宁静再度以光头造型出现在现场,立刻勾起大家对这部戏的无限回忆,只是同5个月前不一样的是,和宁静一同亮相的四位男主角杜雨露、侯勇、刘威和赵君也都通通应剧情的需要剃成了光头,五个人站在一起,镁光灯立刻在他们的头顶闪成一片……为了这次的亮相宁静着实打扮了一番,一件黑色的水貂皮披肩,两只颇具少数民族特色的硕大耳环,一双足有十厘米高的松糕凉鞋,再加上无比灿烂的笑容,这位性格女星看心情是格外不错。

In half duplex, assuming that a collision does not occur, the sending station will transmit 64 bits of timing synchronization information that is known as the preamble.

在半双工,假定碰撞不发生,发送台将传送64位元的时间同步资讯,此被称为前同步位元

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Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势,并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。

This dramatic range, steeper than the Himalayas, is the upturned rim of the eastern edge of Tibet, a plateau that has risen to 5 km in response to the slow but un stoppable collision of India with Asia that began about 55 million years ago and which continues unabated today.

这一引人注目的地域范围,比喜马拉雅山更加陡峭,是处于西藏东部边缘的朝上翻的边框地带。响应启始于约5500万年前的、缓慢的但却不可阻挡的印度与亚洲地壳板块碰撞,高原已上升至五千米,这种碰撞持续至今,毫无衰退。