Carbon-13 NMR data for a range of iron group polynuclear acetylide complexes with μ 2-η 2, μ 3-η 2 and μ 4-η 2 alkynyl groups are presented. For doubly bridging μ 2-η 2-acetylides of Fe, Ru and Os, the C α resonance lies in the range 65–110 ppm downfield of TMS, ...
ChemInform Abstract: Carbon‐13 NMR Chemical Shifts of Some Podophyllum Lignans and Analoguesother bioactive productsmagnetic resonance, nuclear quadrupole resonance (organic substances)ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 ...
Simple model amines are also incorporated since these often supply the basic information required in the assignment of chemical shifts for the more complex compounds. The literature on alkaloid cmr spectroscopy has been covered through 1977, but the collec tion of compounds presented here is ...
Carbon-13 NMR Analysis of Stereodefects in Highly Isotactic Polypropylene by Calculation of Chemical ShiftsKEY WORDSIsotactic Polypropylene/ Stereodefects/ Conformational Probabilities/ Rotational State Model/ 13C NMRThe conformational probabilities for highly isotactic polypropylene involving various types of ...
16, No.9, pp (1984) The Carbon-13 NMR Chemical Shift of Poly(1-butene) Referring to that of 2,4,6,8,10,12,14,16,18-Nonaethylnonadecane and a Comparison of the Chemical Shifts between Poly(1-butene) and Polypropylene Tetsuo ASAKURA,*1 Kazuo OMAKI, Shan-Nong ZHu,*· 1 and ...
The carbon-13 NMR chemical shifts (data not shown) for the two proposed carboxy carbons C-9 (166.3 ppm) and C-7G (172.6 ppm) were also in the expected region, further confirming the presence of the glycine moiety问题补充:匿名 2013-05-23 12:21:38 碳13核磁共振化学位移(数据未示出),...
Agreement between the calculted and observed chemical shifts of all carbons was excellent for both PB and PP. 展开 关键词: 13C NMR Chemical Shift Poly(1-butene) Polypropylene Rotational State Model DOI: 10.1295/polymj.16.717 年份: 1984 收藏...
A correlation between .beta.-hydrogen isotope effects on carbon-13 NMR chemical shifts in unsaturated systems and the strength of hyperconjugative interact... 尾-Hydrogen isotope effects on the carbon-13 NMR chemical shifts of the trigonal carbon in CLC(R)=X (L = H or D) are reported for...
Cussans NJ and Huckerby TN (1975) Carbon-13 NMR spectroscopy of heterocyclic compounds-IV: A 20 MHz study of chemical shifts and carbon-proton coupling constants in a series of hydroxy, methoxy and glucosyl coumarins. Tetrahedron 31 , 2719–2726. View Article...
Evidence is presented which demonstrates that 13C NMR spectroscopy is a valuable technique for distinguishing the sites of methylation, glycosylation and acylation in flavonoid glycoiides, and in some cases the nature and sites of specific sugars and acyl groups. Shifts observed in the spectrum on ...