Lindeman-Adams rule

Calclated according to the Lindeman-Adams Rules ethanol soluble polymers, CDCI3, room temperature ethanol Insoluble polymers, CD2CI4, 120 C... 

The ability of the Lindeman-Adams (LA) rule to predict, 3C chemical shifts of even highly branched alkanes satisfactorily was proven impressively by calculations of the shieldings of the dodecanes 292 to 294 (393). 

Lindeman-Adams [54] and Grant-Paul [55,56] models. In both, the effects of various a, p, y, and 5 substituents on the chemical shielding of a particular carbon are summed. The Lindeman-Adams scheme focuses on saturated hydrocarbons and is therefore most applicable to polyolefins. The Grant-Paul rules apply to saturated carbons, but include corrections for other functional groups. Models which approximate chemical shifts for substituted aromatic [16] and olefinic [57] carbons have also been developed. An example of the use of these calculational schemes is given in Sec. III.B.l. 

Resonance assignments are often made by empirical relationships or rules that relate structural differences to chemical shift differences. These can be based on extensive studies on model compounds as in the case of the Grant-Paul or Lindeman-Adams relationships [1-3] for predicting the chemical shifts of carbon atoms in hydrocarbons and polyhydrocarbons. These have been very valuable for assigning the resonances observed in the spectra of ethylene-propylene copolymers [4,5], propylene-butene-1 copolymers [6,7], hydrogenated polydienes [8-18], and hydrogenated... 

The GP rule (eq. [21]) suffers from the poor statistical analysis for parameters describing methine and quaternary carbon atoms in highly branched alkanes. This was improved by Lindeman and Adams (120), who introduced another equation based on data for 39 alkanes, C5 through C9 ... 

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