The kinetics of the isoprene+maleic anhydride reaction have been studied in various solvents at pressures up to 1400 atm. The solvent effect on the activation volumes and energies at 35°C are reported. It is shown how the solvent effect on activation volumes is useful both for mechanistic interpretation as well as for determination of the dipole moment of the transition state.

No abstract

The partial molal volumes in solution of the transition state of the Menschutkin reaction between pyridine and methyl iodide have been determined. Accurate partial molal volumes of both reactants have been measured and used in conjunction with existing high-pressure kinetic data to find the volumes of the complex. Such results are useful in the interpretation of the structure of the transition state and its intermolecular interactions in solution.

No abstract

The title compound (S,S)-2, has been obtained by reduction with Li[AlH4] of the cyclopentane- 1,2-diyl-bis(1′,3′,2′-dioxaphospholane) (1S ,2S)-trans-C5H8[P(OCH (CO2Pr-i)- (R) - )2]2, (S,S)-1, which itself was isolated in diastereomerically pure form (X-ray structure analysis) from the reaction between rac, trans-C5H8(PCl2)2 and (2R,3R)-(+)-diisopropyl tartrate. Cleavage of (S,.S)-1 withPCl3 yielded an unseparable mixture of (1S,2S)-trans-C5H8(PCl2)2 and (4R.5R) -ClP [OCH(CO2Pr-i)-]2.