نتایج جستجو برای: stereoisomeric group
تعداد نتایج: 979523 فیلتر نتایج به سال:
this thesis basically deals with the well-known notion of the bear-invariant of groups, which is the generalization of the schur multiplier of groups. in chapter two, section 2.1, we present an explicit formula for the bear-invariant of a direct product of cyclic groups with respect to nc, c>1. also in section 2.2, we caculate the baer-invatiant of a nilpotent product of cyclic groups wuth resp...
The tripodal phosphine alcohol CH,C(CH,PPh,),(CH,OH) (dpmp) was prepared and its co-ordination chemistry towards Group 6 metal carbonyls and a manganese(1) complex studied. In [M(CO),(dpmp-P,P')] (M = Cr, M o or W), the tripodal ligand behaves as a bidentate ligand with the hydroxyl site unco-ordinated. Reaction of dpmp with [Mn(CO),Br] gave a stereoisomeric mixture of products, anti,fac[Mn(CO)...
Carbohydrates are an extremely complex group of isomeric molecules that have been difficult to analyze in the gas phase by mass spectrometry because (1) precursor ions and product ions to successive stages of MS(n) are frequently mixtures of isomers, and (2) detailed information about the anomeric configuration and location of specific stereochemical variants of monosaccharides within larger mo...
the present study is an attempt to investigate the potential impact of inspirational quotes on improving english abstract vocabulary recall. to achieve this goal, a multiple choice language proficiency test of 60 items including vocabulary and grammar component was administered to a sample of 63 second-semester male and female students whose age ranged between 17 to 22 and they were studying en...
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