alkylogen,alkyl halide

The synthesis methods for alkyltin halide were reviewed and compared.

综述了烷基卤化锡的合成方法并进行了比较,介绍了烷基氧化锡的生产工艺及分离提纯方法。

It is a novel way that TiCl4,SnCl3 or BCl3 is used as backbone halogenation suppression additive to produce brominated polystyrene with high thermal stability and low ratio of price to performance.

TiCl4、SnCl3或BCl3作为主链烷基卤代抑制剂是生产高热稳定性、价格性能比低的溴代聚苯乙烯的最新方法,该方法生产的溴代聚苯乙烯产品主链上烷基卤的含量低于750mg/kg,较原来降低了90%左右,可适用于耐高温的工程塑料。

A probe into the alkyl′s attracting electron effect;

对烷基吸电子效应的探讨

Alkyl Bonded Silica Phases for High Performance Liquid Chromatography;

高效液相色谱烷基硅胶键合固定相

According to the standard electronegativity of hydrogen atom, The Inductive effect of alkyl in organic compounds was confirmed by the chemical shift of proton in different kinds of alkyl group's ~1H-NMR, and the data of some original compound's( ~(13)C-NMR), and the activity of alcohol and amine in gas-phase, and the stability of its negative io

　以氢原子的电负性为标准,对不同结构烷烃的1H-NMR谱中质子的化学位移值、部分有机化合物的13C-NMR谱测定数据、气相条件下醇和胺的酸性结果及其对应的负离子的稳定性等方面进行分析,证实烷基在有机化合物中存在-I效应。

The relation between the stretching vibration frequency of X = 0 double bond of alkyl substituted compounds R' X = 0 and the Polarizability Effect Index (PEI) of alkyl group R can be expressed as v = a + bPEI (R), where X represents C, and N elements.

烷基取代物R’X=0的X=0键伸缩振动频率ν与烷基R的极化效应指数PEI(R)的关系可表示为:ν=a+bPEI(R)。

The results shawed that the Poarizability Effect Ihdex(PE)of alkyl group R decreases the UV absothing eneny of C = 0 bond.

酮R1R2C＝O的羰基C＝O紫外吸收能量△E与烷基R的极化效应指数PEI（R）的关系可表示为：△E=a＋bPEI（R）。