Yield ratio

Specify the yield ratio or method of determining the yield ratio. 

Entry Substrate Organometal Product Yield % (ratio)... 

The results of dediazoniations in aqueous acid without copper evidently show very little selectivity between sites with quite different electron densities. This is seen, for example, in the products from the reactions of the triarylmethanol derivatives 10.50 with R = C1 and R = CH3 (R" = R" = H). The yield ratios for ring closure to rings B and C (products 10.53 and 10.52 respectively) are 35/39 for R =C1 and 43/45 for R = CH3. The significantly higher yield of phenols (10.54) in the case of R = C1 (39%) relative to that of R = CH3 (10%) indicates that, as expected for a significant contribution by a heterolytic mechanism, the compound 10.50 (R = CH3) has a lower heterolytic, but not a lower homolytic, reactivity. For the same two reagents, but in the presence of copper powder, the ratios of 10.53 to 10.52 are 26/41 for R = C1 and 40/57 for R = CH3, with very little formation of phenols (3%). 

Entries R Olefin Catalyst Solvent T(°C) Yield (%) Ratio 109 110... 

A Monte Carlo simulation (Fig. 3) can be made as usual (that is, without constraints on the output age), in which case only about 24% of the trials will yield ratios corresponding to a finite age, and a younger limit of >821 ka (95% confidence) or >531 ka (68% conf) is indicated. If, however, the a priori assumption of a closed system with no initial °Th is made, the failed trials can be ignored (since they violate the a priori constraints), and solution of both age and age-error (630 +370/-210 ka at 95% conf., or +150/-140 ka at 68% conf) can be obtained from the Monte Carlo simulations. 

DHN) have been characterized by both mass spectroscopy and ll nuclear magnetic resonance analyses as trans-2-geranyl 1,6-DHN and //m.v-5-gcranyl 1,6-DHN with a yield ratio of 10 1. 

Lewis acid (equiv) Enol ether Yield (%) Ratio exo/endo Ratio cis/trans... 

Entry Rt R, R3 R4 Diene Conditions Products Yield(%) Ratio... 

Entry Solvent Lewis acid Reaction time Reaction temp. Yield (%) Ratio 193 194... 

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