吡啶

The selective hydrogenation of crotonaldehyde to crotyl alchol was carried out over finely dispersed polyvinylpyrrolidone-stabilized ruthenium clusters.

以聚乙烯吡啶烷酮稳定的钌纳米金属簇为催化剂，进行了巴豆醛的选择性催化氢化。

The emphasis was on chemical properties,application,main production methods,market,and prospects of main deriva- tives of acetaldehyde such as ethyl acetate,pentaerythritol,glyoxal,peracetic acid, crotonaldehyde and pyridine.

介绍了国内外乙醛及其主要衍生物的生产技术发展及其市场供需状况，尤其对乙醛主要衍生物乙酸乙酯、季戊四醇、乙二醛、乙醛酸、丁烯醛、吡啶的化学性质与用途、主要生产方法、市场供需状况及开发前景作详细介绍和分析。

Both crystallographically unique Zn atoms exit as an octahedral geometry. The four equatorial positions of Zn1 atom are occupied by the carboxylate-oxygen atoms of the two tartrates, and the two oxygens of the left four carboxylate-oxygen atoms coordinate to two different Zn2 atoms, respectively, forming infinite coordination polymer chains. The left two of the trans equatorial positions of Zn2 atom are completed with two oxygen atoms of two water molecules. The axial positions of both Zn atoms are occupied by the nitrogen atoms from different 4,4'-bipyridine molecules to give a 2D rectangular-grid layers with a cavity dimension of 0.51165(3)nm×1.13896(5) nm. A three dimensional network is formed by the crystallization water chains joined by the carboxylate-oxygen atoms through hydrogen-bonding interactions.

两个晶体学独立的Zn原子均为八面体构型，其中Zn1原子赤道配位点被2个酒石酸根中的4个羧酸根氧螯合配位， 2个酒石酸根中剩下的4个羧酸根氧中的2个分别与2个Zn2原子连接形成无限一维链， Zn2原子的另外2个反式赤道配位点被2个水分子氧占据，同时这两种Zn原子的轴向配位点均被4，4'-联吡啶的氮原子占据，形成具有矩形格子[0.51165(3) nm×1.13896(5) nm]的二维层状结构，游离的2个水分子通过氢键作用形成二聚体，并与酒石酸根中未与Zn配位的羧酸氧连接，把二维层状结构连接成三维网状的超分子结构。

The process of preparation for 2-chloro-5-chlormethylpyridine by cyclopentadiene cyclization needs to do more research by using green process and decreasing the wastes.

2-氯-5-氯甲基吡啶的合成采用环戊二烯环合法，需研发有利于环境的绿色生产工艺，减少三废，治理三废。

Cyclopentenopyridine(3) in yield of 65% was synthesized from acrolein ,cyclopentanone and NH3 by heterogeneous catalysis reaction through a fixed bed reactor.

以丙烯醛和环戊酮为原料，用固定床多相催化法合成了2，3-环戊烯并吡啶，收率65%，含量高于50%。

The types and kinds of medical intermediate compounds thiaphenol series, pyridine series, cyclopentanone derivant etc.

医药中间体（噻酚系列、吡啶系列、环戊酮衍生物等）品种多样，产品质量保证，深受广大客户好评。

Dihydro-5H-cyclopentanopyridine, a key intermediate of Cefpirome, was synthesized from cyclopentanone and propargylamine under autoclave prompted by copper chloride.

以环戊酮和丙炔胺为原料，在高压釜中用氯化亚铜催化合成头孢匹罗关键中间体6，7-二氢-5H-环戊烷并吡啶。

Resonance Raman spectra of aggregated meso-tetra(4-pyridinium)porphyrin diacid (H8TPyP6+)were studied with excitation near the exciton absorption bands of 470 nm.

研究了近激子吸收带激发下四-(4-吡啶基)卟啉二酸(H8TPyP6+)聚集体的共振拉曼光谱。

The technological conditions for preparation of pyridinium dialkyl dithiophosphate were optimized and a three-step process was finally determined.

采用三步工艺合成了表面修饰剂二烷基二硫代磷酸吡啶，优化确定了PyDDP制备工艺条件，并利用红外光谱确认了其结构。

A series of complex EuTb(subscript 1-x)3Dipy were synthesized in anhydrous alcohol with dibenzoyl methane and 2, 2-dipyridyl.

合成了稀土（Eu(上标 3+)和Tb(上标 3+)）与二苯甲酰甲烷、2，2'-联吡啶的一系列稀土配合物EuTb(下标 1-x)3Dipy。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。