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Showing 1 to 17 of 17 for “"multiple bonds"”.
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Transannular Interaction Between Nitrogen and Multiple Bonds
Made available in DSpace on 2014-12-05T19:37:34Z (GMT). No. of bitstreams: 1 6100101.pdf: 4665679 bytes, checksum: 4a96bc87bfbff397fb51faf3b6102286 (MD5) Previous issue date: 1960
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Metal Complexes of Organic Molecules Containing Multiple Bonds
The kinetics of the rearrangement of benzaldoxime to benzamide, catalysed by nickel acetate tetrahydrate in digol, are reported. The process is exothermic. Apparatus designed to study the rearrangement at a constant temperature and an infrared spectroscopic technique for the detection of benzamide …
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Metal-ligand multiple bonds in organometallic complexes containing triamidoamine ligand systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1996.
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The catalytic hydrogenation of carbon-carbon and carbon-nitrogen multiple bonds by a cobalt(I) complex
… for the catalytic hydrogenation of carbon-carbon multiple bonds can be attributed to the well-defined reactivity, stability and overall high activity of such catalytic systems. The development of sustainable, more abundant and relatively less toxic late first-row transition metal complexes to …
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EXPLORATION AND MECHANISTIC STUDY OF WEAKLY COORDINATING ANIONS UNDER THERMAL AND PHOTOCHEMICAL CONDITIONS FOR SELECTIVE TRANSFORMATIONS OF C-C MULTIPLE BONDS
The underlying focus of this work has been to acknowledge the effects of anions in transition metal-based systems. In this respect, a novel family of weakly coordinating anions (imadazolylphenyl or IMP anions) in addition to traditional anions were compared under both thermal and photochemical …
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Controlling electronics for the formation of high valent uranium imido complexes
… involvement in the uranium-nitrogen multiple bonds. Thus, the formation of an unprecedented uranium tris(imido) species <em>via</em> multi-electron redox chemistry mediated by redox-active ligands as well as its bonding properties will be discussed. Additionally, the synthesis and …
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Synthesis and Reactivity of Anthracene-Based Molecular Precursors for Low-Valent Boron Species
… study of compounds containing elusive main group multiple bonds has long been a topic of immense interest. Today, it remains an attractive path towards unlocking new reactivity and developing a complete empirical understanding of chemical bonding. However, due in large part to a lack of suitable …
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From molecular Au(I) complexes to subnanoclusters and nanoparticles: study of the influence of secondary interactions in (photo)catalytic systems
… of weak interactions, specifically gold hydrogen bonds Au···H-C, has been assessed throughout the entire catalytic energy profile. On other hand, the ability of different functional groups to stabilize gold subnanoclusters (AuSNC), characterized by their short-lived nature and strong tendency to …
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Stochastic dynamics of adhesion clusters under force
… adhesion clusters. The transition from single to multiple bonds, however, is not trivial and requires theoretical modelling. Rupture of biological adhesion molecules is a thermally activated, stochastic process. In this work, a stochastic model for the rupture and rebinding dynamics of clusters of …
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A computational study of the structure, bonding, and thermochemical properties of primary Ozonides derived from substituted Phenol and Thiophenol
… overemphasized. Ozone reacts with carbon-carbon multiple bonds such as in alkenes via the ozonolysis process. The first step of ozonolysis involves the formation of an important but very unstable primary ozonide (POZ) which after formation, immediately rearranges to the more stable secondary …
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Synthesis, Characterization And Reactivity Studies Of Nickel Complexes Supported By A Phosphinimine-Based Pincer Ligand
… transition metal complexes with metal–ligand multiple bonds. Herein, we report a series of novel nickel complexes supported by a pincer-type bis(phosphinimine) ligand framework {HN(1,2-C6H4N=PPh2Me)2}. Metalation of the ligand onto NiCl2(dme) formed the nickel chloride species …
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Modelling multivalent interactons
… or a lipid bilayer, has the ability to form multiple bonds to a substrate. Hence, a multivalent interaction can be strong, even if the individual bonds are weak. However, much more interestingly, multivalency enables the design of highly specific interactions using non-specific individual …
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Synthesis, characterization, anion complexation and electrochemistry of cationic Lewis acids
Owing to the favored Coulombic attraction between the ammonium group and anion which stabilizes the B-F/B-CN bond against heterolysis, cationic borane [25]+ has great affinity toward anions than its neutral analog, and is capable of capturing fluoride or cyanide from water under bi-phasic …
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Mechanistic Studies of pi-Activation Catalysis by Cationic Gold(I) and Brønsted-acid
… catalysts for the functionalization of C-C multiple bonds through the addition of carbon- or heteroatom-nucleophiles across π-bonds or cycloisomerizations of enynes and related π-systems. Mechanisms involving outer-sphere attack of a nucleophile on the electrophilic π-ligand of a cationic …
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Structure-property relationships in physical polymer gels
… kinetics, but it is also possible to incorporate multiple bonds within a single association such that the association has a constant bond energy regardless of the number of bonds. The network relaxation can be grouped into two cases - one where a dissociated dangling chain is able to fully relax …
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Theoretical and computational investigations of the electron and spin correlation in chemical bonds, building a predictive bonding model with generalized valence bond theory
… is to understand the nature of chemical bonds. By understanding the underlying physical and chemical principles of chemical bonding in various molecules, chemists can make predictions about the structures, energetics, reactivities and other properties of chemical species. The …
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ΑΝΤΙΔΡΑΣΕΙΣ ΕΝΩΣΕΩΝ ΜΕ ΠΟΛΛΑΠΛΟΥΣ ΔΕΣΜΟΥΣ ΜΟΛΥΒΔΑΙΝΙΟΥ-ΜΟΛΥΒΔΑΙΝΙΟΥ
A KINETIC AND MECHANISTIC STUDY OF THE PROTON OXIDATION ADDITION REACTION OF MO2CL8 4- TO MO2CL8H3- HAS BEEN CARRIED OUT IN 6M HCL . THE KINETICS ARE FIRST ORDER IN THE CONCENTRATION OF THE ACID AND FIRST ORDER IN THE MO2 4+ REACTANT. THE ACTIVATION ENERGY IN 6M HCL IS 49,3 KJ MOLE-1. THE RATE IS …