考察通过c-t图寻找half-life (time taken for [cis-platin] to half),找图线纵坐标为10所对应的横坐标,读数为460,注意每个小格子对应数值为20min。 4、a) A。考察rate equation的单位和物质的order。overall order是2,B错;rate可以定义为 △c/ △t,所以单位是 mol dm-3 s-1,C错;[CH3COCH3]是1st ...
Rate enhancements by cationic surfactants of the SN2 reaction of Cl- with methyl naphthalene-2-sulfonate (MeONs) follow a typical pseudophase model in which the interaction between Cl- and micel-lized surfactant is written as an equation of the Langmuir form with a binding constant, KC1. The...
particularly around key oxidation events, and thus helped to pave the way for the evolution of plants and animals of the modern world. LEoarntgh'esrrodtaaytisoninpcerreiaodseisn2e4t hboeunrtshaitcpOre2seenxtp, obrutt fluxes may have been as low as 6 hours at ages older than 4 Ga...
The methods of relating parameters in the Arrhenius rate equation to fundamental molecular properties are briefly reviewed. The limited applicability of purely theoretical methods is noted, the use and limitations of the standard semiemprical method are surveyed, and recent work based on empirical molecu...
The rate expression for a chemical reaction can be determined from its chemical equation. Increasing the surface tension causes an increase in the reaction rate. True or False? True or false: The rate of a chemical reaction is the amount of reactant that changes to...
All of the values, for 35 solvents for 1 and for 37 solvents for 2, have been used in an extended Grunwald-Winstein equation treatment using NT and YOTs values. Activation parameters in several solvents and kinetic solvent isotope effects (MeOH/MeOD) have been determined for both substrates...
An extended GrunwaldWinstein equation treatment shows similar sensitivities to changes in solvent nucleophilicity and solvent ionizing power for 1, 2, and 3, and a concerted SN2 attack is proposed in each case. Product studies for the solvolyses of 2 in aqueous alcohols are presented.doi:10.1080...
(A11) Thus, the control equation for outer region can be written as: 1∂ r ∂r r ∂ppm2 ∂r + km2vi ∂ ∂ppm2 km2hi ∂z ∂z = (φct)m2iµgi k f hi (φct) f i+m1iµgi ∂ppm2 αtkm2hi (φct) f i+m1iµgi k f hi ∂(βt) (A12) By using ...
fCalculated using equation 3. gCorresponding value of 0.039 for the addition–elimination component towards the solvolysis of 1-adamantyl fluoroformate at 50.0 °C (ref. 10). 3. Discussion With the tertiary 1-adamantyl group incorporated into the haloformate esters, the chloroformate reacted across...