Mercantile
发表于 2025-3-23 12:03:54
Stereoelective Anionic Polymerization of Chiral Vinyl Monomers Via Interconverting Ion Pair Epimerschiral centers at the end of the growing chain. The ion pair is considered the last chiral center. The resulting diastereomeric dyads, triads, and tetrads are given for each mechanism. Many of these mechanisms predict that by controlling the optical purity of the monomer feed one may control the stereoregularity of the resulting polymer.
Cougar
发表于 2025-3-23 17:09:44
Cation Effects in Organoalkali Metal Chemistryostatic forces between cations and anions. This generalization is believed to hold even for organolithium compounds with localized negative charge, although here some small carbon-lithium covalency may enhance bonding . From the simplified structure R.M., it is tempting to think that the natu
比喻好
发表于 2025-3-23 20:48:29
Structure and Dynamic Behavior of Organolithium Compoundsxist as the partially negative part of some organometallic compound. Ideally, in order to learn about carbanions one should study organocesium or organorubidium compounds since these materials are most likely to contain carbanions. Unfortunately, such compounds do not form stable solutions; they eit
oxidize
发表于 2025-3-24 01:41:51
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collagenase
发表于 2025-3-24 05:21:24
New Aspects of Carbanion Chemistry. Structure of Pentadienyl Anions and Butenediyl Dianions and theilvated pentadienyllithium assumes the W-shaped (.,.)-geoemtry. The EHMO calculation on the pentadienylpotassium indicates the substantial stability of the U-shaped geometry. A variety of transmetallation of pentadienylpotassium is summarized briefly. A novel preparative method of 2-butene-l,4-diylma
SPURN
发表于 2025-3-24 08:00:13
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温和女人
发表于 2025-3-24 14:31:15
Clarification of some Problems of Anionic Polymerizationymerization. Vigorous studies of anionic polymerization started in the late fifties, and progress in this field has been reported in numerous reviews published during the last 20 years , The published results are, on the whole, mutually consistent and accounted for by plausible mechanisms accepte
chlorosis
发表于 2025-3-24 15:29:36
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爱国者
发表于 2025-3-24 20:36:50
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Albumin
发表于 2025-3-24 23:32:08
Kinetics and Thermodynamics of Anionic Polymerization of 2-Isopropenyl Pyridine in Toluenese, the anionic polymerization of alpha-substituted vinyl monomers was most readily studied because of their relatively low ceiling temperature. In these studies, both the polymerization rate constants and equilibrium constants have been determined but the rate of depolymerization has not been