Track topics on Twitter Track topics that are important to you
The isomerization of aliphatic amine radical cations via intermediate [cyclopropane-NH 3 ] +. and [cyclopropane-amine] +. ion- neutral complexes was studied experimentally with double-focusing mass spectrometers and computationally with composite ab initio methods. The results examine and extend Audier's suggestion that primary amine radical cations with alkyl substituents at the β- and/or γ- carbon atoms isomerize via transient complexes of NH 3 and alkyl cyclopropanes; these are formed by ring closure of the easily accessible γ-distonic isomers. Ionized amines with substituents at the α-carbon may react analogously when trialkyl cyclopropane complexes can be formed. Isomerization via complex intermediates is a major reaction pathway when the internal energy of the amine radical cation is less than that required for simple CC-bond cleavage. Complexes of unsubstituted or monosubstituted ionized cyclopropanes rarely contribute to the isomerization reactions. Secondary and tertiary amine radical cations do not undergo isomerization via cyclopropane intermediates, whereas aliphatic ether radical cations do.
This article was published in the following journal.
Name: The journal of physical chemistry. A
The Crabtree's reagent catalyzes the isomerization of N-sulfonyl 2,2-disubstituted aziridines to allyl amines. The selectivity of allyl amine vs imine is very high (up to 99/1). The unprecedented isom...
Kinetic and computational data reveal a complex behaviour of the important environmental free radical oxidant NO• in its reactions with aliphatic amino acids, di- and tripeptides, suggesting that at...
Cyclopropane fatty acids which can be simply converted to methylated fatty acids are good unusual fatty acid candidates for long term resistance to oxidization and low temperature fluidity useful for ...
The Mizoroki-Heck reaction is one of the most efficient methods for alkenylation of aryl, vinyl, and alkyl halides. Due to its innate nature, this protocol requires the employment of compounds possess...
The formation and hyperpolarization of an [Ir(H)₂(amine)(IMes)(η²-imine)]Cl complex that can be created in a hyperpolarized nuclear singlet state is reported. These complexes are formed when an eq...
The primary objectives of the study are to test whether brain Mono Amine Oxidase-A (MAO-A) levels are elevated in patients with treatment-resistant major depression, and to explore whether...
With this project the investigators aim to investigate whether premature ventricular complexes (PVC) have a prognostic significance in persons without structural heart disease. Further the...
Fatty acids containing a cyclopropane ring in their structure (CPFA) have been found in plants, fungi, a wide variety of bacteria and recently detected in dairy products and bovine meat. L...
Light curing cements used for laminate veneers may be not totally cured in certain areas, so dual cured resin cements may solve this problem yet the dual cured cements containing amines ca...
Prospective controlled study (Canadian Task Force II-2) : Comparison analysis regarding surgical outcomes, complications, overall survival (OS), disease free survival (DFS) and cancer spec...
Organic esters or salts of sulfonic acid derivatives containing an aliphatic hydrocarbon radical.
Biogenic amines having more than one amine group. These are long-chain aliphatic compounds that contain multiple amino and/or imino groups. Because of the linear arrangement of positive charge on these molecules, polyamines bind electrostatically to ribosomes, DNA, and RNA.
The univalent radical OH. Hydroxyl radical is a potent oxidizing agent.
Three-carbon cycloparaffin cyclopropane (the structural formula (CH2)3) and its derivatives.
Inorganic salts of HYDROGEN CYANIDE containing the -CN radical. The concept also includes isocyanides. It is distinguished from NITRILES, which denotes organic compounds containing the -CN radical.