Abstract: In this study an appropriate computational approach was presented for estimating the boiling temperatures of 41 different types of olefins and their derivatives. Based on the guidelines of this approach, several structural indices related to the organic components were applied using graph theory. Meanwhile, in addition to evaluating the relation between the boiling temperatures of ole...

For the first time, α-formyldiazoacetates have been successfully applied for the asymmetric cyclopropanation of alkenes via Co(ii)-based metalloradical catalysis. The cobalt(ii) complex of the D2-symmetric chiral amidoporphyrin [Co(3,5-Di t Bu-ChenPhyrin)] is an effective metalloradical catalyst that can activate α-formyldiazoacetates to cyclopropanate both aromatic and aliphatic olefins with v...

For the first time, a-formyldiazoacetates have been successfully applied for the asymmetric cyclopropanation of alkenes via Co(II)-based metalloradical catalysis. The cobalt(II) complex of the D2symmetric chiral amidoporphyrin [Co(3,5-DiBu-ChenPhyrin)] is an effective metalloradical catalyst that can activate a-formyldiazoacetates to cyclopropanate both aromatic and aliphatic olefins with varie...

The adequate configuration and the effect of reduction was studied for In2O3-ZrO2/SAPO-34 catalyst with aim improving its performance (activity selectivity in pseudo-steady state) hydrogenation CO, CO2 CO2/CO (COx) mixtures into olefins. experiments were carried out a packed bed reactor at 400 °C; 30 bar; H2/COx ratio 3; CO2/COx ratios 0, 0.5 1; space time (referred to as In2O3-ZrO2 mass) 3.35 ...

Ethanol, as a clean energy source, is an ideal raw material for the preparation of C4 olefins, but there are few studies on olefins by coupling ethanol. This research based data from Question B 2021 Chinese Contemporary Undergraduate Mathematical Contest in Modeling. The researchers firstly perform interpolation and visualization processing original data. Secondly, two-dimensional analysis, we ...

N-doped graphene used as an efficient electron donor of iron catalysts for CO hydrogenation can achieve a high selectivity of around 50% for light olefins, significantly superior to the selectivity of iron catalysts on conventional carbon materials, e.g. carbon black with a selectivity of around 30% at the same reaction conditions.

Fifty years ago Ziegler and co-workers reported the Aufbaureaktion for alkylaluminum compounds.[1] This reaction involves a stepwise insertion of ethylene into the Al C bonds of, for example, triethylaluminum to give long-chain trialkylaluminum compounds [Eq. (1)]. Today, this chaingrowth reaction is commercially exploited for the synthesis of linear -olefins and primary alcohols from ethylene.[2]

The first highly regioselective and general osmium-catalyzed hydroformylation of olefins to aldehydes is reported. The combination of Os3(CO)12 and imidazoyl-substituted phosphine ligands allows n-selective (up to 99%) hydroformylation of bulk aliphatic as well as functional alkenes in good yields (64-87%).