Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Complexes, molecular

We will now treat the internal motion on the PES in cases of progressively increasing molecular complexity. We start with the simplest case of all, the diatomic molecule, where the notions of the Bom-Oppenlieimer PES and internal motion are particularly simple. [Pg.55]

Here Icq /fQ2 because (A3.4.52) proceeds tlu-ough a highly-excited molecular complex iwith particularly... [Pg.771]

Naturally occurring molecular ensembles such as proteins from photosyntlietic systems (plants, algae, photosyntlietic bacteria, etc) are usually relatively rigid systems tliat contain various cliromophores and hold tliem at fixed positions and orientations relative to each otlier. That is why, despite tire numerous energy jumps between tire cliromophores, tlie resulting emitted fluorescence is polarized. The extent of tliis polarization tlius affords invaluable infonnation about tlie internal stmcture of molecular complexes. [Pg.3022]

S-S annihilation phenomena can be considered as a powerful tool for investigating tire exciton dynamics in molecular complexes [26]. However, in systems where tliat is not tire objective it can be a complication one would prefer to avoid. To tliis end, a measure of suitably conservative excitation conditions is to have tire parameter a< )T < 0.01. Here x is tire effective rate of intrinsic energy dissipation in tire ensemble if tire excitation is by CW light, and T = IS tire... [Pg.3023]

Demidov A A 1999 Use of Monte-Carlo method in the problem of energy migration in molecular complexes Resonance Energy Transfer e6 D L Andrews and A A Demidov (New York Wiley) pp 435-65... [Pg.3031]

Picrates, Picric acid combines with amines to yield molecular compounds (picrates), which usually possess characteristic melting points. Most picrates have the composition 1 mol amine 1 mol picric acid. The picrates of the amines, particularly of the more basic ones, are generally more stable than the molecular complexes formed between picric acid and the hydrocarbons (compare Section IV,9,1). [Pg.422]

Although no chemical reaction occurs, measurements of the freezing point and infra-red spectra show that nitric acid forms i i molecular complexes with acetic acid , ether and dioxan. In contrast, the infrared spectrum of nitric acid in chloroform and carbon tetrachloride - is very similar to that of nitric acid vapour, showing that in these cases a close association with the solvent does not occur. [Pg.32]

Heating Kemp s acid with appropriate aromatic diamines yields bis-imides with two convergently oriented carboxylic acid groups on the edges of a hydrophobic pocket. Dozens of interesting molecular complexes have been obtained from such compounds and can be traced in the Journal of the American Chemical Society under the authorship of J. Rebek, Jr., (1985 and later e.g. T. Tjivikua, 1990 B). [Pg.347]

The phenomenon of dye aggregation was discovered in the 1930s (52,53). Polymethine dyes were found to form molecular complexes in solution or on certain crystal surfaces. Molecules within aggregates are bound together by nonvalence bonds, ie, resonance interactions exist between them. [Pg.494]

Table 3 (3) shows the influence of branching of the alkyl group on volatility and complexity, usiag titanium and zirconium amyl oxides as examples. Table 3. Boiling Points and Molecular Complexities of Amyloxides of Titanium and of Zirconium... Table 3 (3) shows the influence of branching of the alkyl group on volatility and complexity, usiag titanium and zirconium amyl oxides as examples. Table 3. Boiling Points and Molecular Complexities of Amyloxides of Titanium and of Zirconium...
RinM(OR) CAS Registry Number bp, °C/Pa Molecular complexity CAS Registry Number bp, °C/Pa Molecular complexity... [Pg.22]

The adsorbed layer at G—L or S—L surfaces ia practical surfactant systems may have a complex composition. The adsorbed molecules or ions may be close-packed forming almost a condensed film with solvent molecules virtually excluded from the surface, or widely spaced and behave somewhat like a two-dimensional gas. The adsorbed film may be multilayer rather than monolayer. Counterions are sometimes present with the surfactant ia the adsorbed layer. Mixed moaolayers are known that iavolve molecular complexes, eg, oae-to-oae complexes of fatty alcohol sulfates with fatty alcohols (10), as well as complexes betweea fatty acids and fatty acid soaps (11). Competitive or preferential adsorption between multiple solutes at G—L and L—L iaterfaces is an important effect ia foaming, foam stabiLizatioa, and defoaming (see Defoamers). [Pg.236]

SAMs provide the needed design flexibUity, both at the individual molecular and at the material levels, and offer a vehicle for investigation of specific interactions at interfaces, and of the effect of increasing molecular complexity on the stmcture and stabUity of two-dimensional assembHes. These studies may eventuaUy produce the design capabUities needed for assembHes of three-dimensional stmctures (109). [Pg.536]

Nitrating cellulose with pure HNO is the simplest method of obtaining CN. In practice, nitration does not occur with acid concentrations below 75%. At acid concentrations <75%, an unstable compound (so called Knecht compound) is formed which has been described as a molecular complex or an oxonium salt of the nitric acid (72). HNO concentrations of 75—85% yield CN with 5—8% N, which dissolve in excess acid. CN with % N of 8—10% are formed at acid concentrations of 85—89%. Above 89%, a heterogeneous nitration occurs without apparent swelling of the cellulose fibers. CN with 13.3% N can be obtained with 100% HNO. Addition of inorganic salts to 100% HNO can raise the % N to 13.9. [Pg.268]

The third category ( associated solutions ) refers to solutions in which molecular complexes may form, either through association of like or unlike species, or... [Pg.48]

Molecular complexity can be used as an indicator of the frontiers of synthesis, since it often causes failures which expose gaps in existing methodology. The realization of such limitations can stimulate the discovery of new chemistry and new ways of thinking about synthesis. [Pg.2]

There are many transforms which bring about essentially no change in molecular complexity, but which can be useful because they modify a TGT to allow the subsequent application of simplifying transforms. A frequent application of such transforms is to generate the retron for some other transform which can then operate to simplify structure. There are a wide variety of such non-simplifying transforms which can be summarized in terms of the structural change which they effect as follows ... [Pg.11]

Functional Group-based Strategy. The use of functional groups to guide the retrosynthetic reduction of molecular complexity. [Pg.97]

Molecular Complexity. A measure of the combined effects of molecular size, element and functional-group content, internal connectedness, stereocenter content, reactivity, and instability that lead to difficulties of synthesis. [Pg.97]


See other pages where Complexes, molecular is mentioned: [Pg.138]    [Pg.2120]    [Pg.2438]    [Pg.3021]    [Pg.142]    [Pg.142]    [Pg.143]    [Pg.677]    [Pg.315]    [Pg.344]    [Pg.88]    [Pg.197]    [Pg.225]    [Pg.23]    [Pg.430]    [Pg.174]    [Pg.855]    [Pg.855]    [Pg.18]    [Pg.124]    [Pg.1]    [Pg.2]    [Pg.2]    [Pg.2]    [Pg.9]    [Pg.15]    [Pg.16]    [Pg.59]    [Pg.83]   
See also in sourсe #XX -- [ Pg.2 , Pg.2 ]

See also in sourсe #XX -- [ Pg.3 , Pg.43 ]

See also in sourсe #XX -- [ Pg.197 ]

See also in sourсe #XX -- [ Pg.152 , Pg.156 ]

See also in sourсe #XX -- [ Pg.743 , Pg.744 ]




SEARCH



A Molecular Dynamic Study of Complexing

A molecular orbital description of the bonding in organometallic complexes

Adsorption theory molecular complexes

Algorithmic complexity and the principles of molecular computing

Alkylidyne-metal complexes molecular structure

Alkynyl complexes, molecular second-order

Alq3 molecular glass structure, chelate complexes

Amides molecular complexity

Antibonding molecular orbitals octahedral complexes

Azide complex, molecular

Azide complex, molecular structure

Block copolymers with complex molecular architecture

Bromine molecular complexes

Cadmium complexes, molecular

Calixarenes molecular complexation

Carbohydrates molecular complexes

Carbonyl complexes molecular orbitals

Catalyst research, chiral molecular complexes

Cationic complexes molecular

Chelate complexes, molecular glass structure

Cobalt complexes molecular structures

Comparative molecular genetics complexity

Complex Molecular Architectures

Complex fluids, molecular simulation

Complex ions molecular orbital model

Complex ions molecular orbitals

Complex molecular modeling

Complex molecular ratio

Complex molecular structure analysis

Complex molecular systems

Complex, crystalline molecular

Complexation molecular mechanisms

Complexes molecular orbital theory

Complexes molecular recognition

Complexes of molecular oxygen

Computational Chemistry, Molecular Complexity and Screening Set Design

Constructing Molecular Complexity and Diversity by Cycloaddition Reactions of Fulvenes

Coordination complexes molecular orbitals

Copper complex, molecular structure

Copper complexes molecular knots

Copper complexes molecular orbital calculations

Diamines molecular complexes

Diboraheterocycle metal complexes molecular structures

Donor-acceptor molecular complexes

Excited molecular complexes

Extended Hiickel molecular orbital complexes

Gas phase molecular complexes

Germanium complexes molecular structure

HYBRID METHODS OF MODELING COMPLEX MOLECULAR SYSTEMS

Hamiltonian molecular, complex scaling

High molecular weight polymers complexes

High molecular weight polymers macromolecular complexes

Highest occupied molecular orbital complexes

Highest occupied molecular orbital transition-metal complexes

Host molecular complexes

Host-guest complexes, molecular structures

Hydrazine complex, molecular

Hydrazine complex, molecular structure

Hydride bridged complexes molecular structure

Hydrogen bonded molecular complexes

Hydrogen bonded molecular complexes level

Hydrogen molecular complex ions

Hydrogen molecular, reaction with ruthenium complexes

Imido complexes molecular structure

Inclusion complexation molecular basis

Inorganic complex, high molecular

Inorganic complex, high molecular polymer

Inorganic complex, high molecular weight

Inorganic complexes, molecular orbital

Ionic complexes, molecular components

Ionizing radiation molecular complexes

Lanthanide complexes, phosphorescent emission, molecular glasses

Large molecular complexes, phase extension

Lewis acid-bases molecular addition complexes

Low Molecular Weight Complexes

Lowest unoccupied molecular orbital transition-metal complexes

Macrocyclic ligands molecular neutral complexes

Macropolycyclic ligands molecular cation complexes

Macropolycyclic ligands molecular neutral complexes

Macrotricycles molecular cation complexes

Manganese molecular complexes

Metal alkoxides molecular complexity

Metal complexes, of molecular

Metal-ligand complexes molecular orbitals

Methyltin Halides and Their Molecular Complexes

Molecular Complexes of Halogens

Molecular Complexes with Calixarenes

Molecular Conductors Based on M3Q7 Cluster Complexes

Molecular Coordinative Complexes by Ligand Fields Analysis

Molecular Modeling cation complexation

Molecular Orbital Theory More Complex Examples

Molecular Orbitals in Complexes

Molecular Rearrangements in Polynuclear Transition Metal Complexes

Molecular Specificity in the Complexation

Molecular Structures of Transition Metal Complexes

Molecular biology polymerase complexes

Molecular cationic metal complexes

Molecular complex , definition

Molecular complex calculations

Molecular complex formation

Molecular complex structure

Molecular complexation

Molecular complexation reactions

Molecular complexes Prussian blue solids

Molecular complexes bromine-dioxane

Molecular complexes bromine-pyridine

Molecular complexes catalyst preparation

Molecular complexes composition

Molecular complexes conformational analysis

Molecular complexes energetics

Molecular complexes macromolecular compounds

Molecular complexes macromolecules

Molecular complexes nanotechnology

Molecular complexes proteins

Molecular complexes stoichiometry

Molecular complexes substrate-catalyst

Molecular complexes transfer states

Molecular complexes with Lewis acid

Molecular complexes, chiral interactions

Molecular complexes, fine

Molecular complexes, fine structure constants

Molecular complexes, representation

Molecular complexes/exciplexes

Molecular complexity

Molecular complexity aluminosilicate

Molecular complexity aluminum alkoxide

Molecular complexity functional

Molecular complexity indices

Molecular complexity transition metal alkoxides

Molecular complexity, relative standard

Molecular conductors complexes

Molecular diol complexation

Molecular dynamics time complexity

Molecular electronics metal-alkyne complexes

Molecular example: spin-transition complex

Molecular glasses, optoelectronic applications chelate complexes

Molecular heterocycles, lanthanide complexes

Molecular hydrogen complexes

Molecular inclusion complexes

Molecular interactions noncovalent complexes

Molecular interactions, complexity

Molecular interactions, complexity naturally occurring

Molecular ligand-receptor complex

Molecular mechanics amine metal complexes

Molecular mechanics time complexity

Molecular metal complexes

Molecular modeling metal complexes with open

Molecular modelling crown ether-cation complexes

Molecular modelling metal complexes

Molecular modelling transition metal complexes

Molecular monomer complex

Molecular motion, cyclodextrin complexes

Molecular orbital diagram, octahedral transition metal complex

Molecular orbital models, solid-state complexes

Molecular orbital octahedral complex

Molecular orbital pathways complex

Molecular orbital theory for octahedral complexes

Molecular orbitals for octahedral complexes

Molecular orbitals in octahedral complexes

Molecular orbitals metal-carbonyl complexes

Molecular orbitals square planar complex

Molecular orbitals tetrahedral complexes

Molecular orbitals transition metal complexes

Molecular phylogenetics species complexes

Molecular recognition complexation. thermodynamic parameters

Molecular relaxation, cyclodextrin complexes

Molecular second-order measurements complexes

Molecular sieves, chiral metal complex

Molecular specificity of cyclodextrin complexation

Molecular string complexes

Molecular structure complex, coherence

Molecular structure complexity

Molecular structures bispidine complexes

Molecular systems complex energy quantization

Molecular systems complex representation

Molecular transition metal complexes

Molecular transition metal siloxide complex

Molecular transition-metal complexes in solids

Molecular, Complex Ionic, and Solid-State

Molecular, Complex Ionic, and Solid-State PON Compounds

Molecular, Low-Dimensional CT Complexes and -Conjugated Organic Oligomers

Molecular-orbital calculations complexes

Molybdenum complexes molecular orbital calculations

Natural products molecular complexity

Nickel complexes molecular magnets

Nickel complexes molecular parameters

Nickel complexes, molecular structures

Noncovalent molecular complex

Nuclear quadrupole resonance molecular complexes

Octahedral complex molecular orbital diagram

Octahedral complexes molecular orbital model

Octahedral complexes molecular orbital theory

Octahedral complexes, molecular

Octahedral complexes, molecular orbitals

Of molecular complexes

Optoelectronics, molecular glasses chelate complexes

Oxygen center attachment, molecular complex

Oxygen-evolving complex molecular structure

Peroxo complex, molecular structures

Platinum complexes molecular orbital calculations

Platinum complexes, phosphorescent emission w-heterojunction devices, molecular glasses

Polynuclear transition metal complexes molecular rearrangements

Practical Applications of Molecular Capsules and Their Cage Complexes

Principle of Molecular Imprinting for Metal Complexes on Surfaces

Protein-ligand complexes, molecular

Protein-ligand complexes, molecular recognition

Pyridine molecular complex with bromine

Reaction of Polymer-Heme Complexes with Molecular Oxygen

Reactions of NHC-coordinated Metal Complexes with Molecular Oxygen

Reductionism complexity and molecular medicin

Selectivity of Molecular Complex

Simulations complex molecular systems

Square-planar complexes molecular orbital bonding

Structures and Molecular Complexes

Superoxo complex, molecular structures

Supported Metal Complexes—Molecular Analogues Bonded to Surfaces

TPD complexes charge transport of molecular glasses, hole

Template-Directed Self-Assembly toward Complex Molecular Knots and Links

Ternary molecular complex

Tetrahedral complexes, molecular

The Design of Molecular Complexes

Transition State Theory Molecular Nature of the Activated Complex

Tungsten complexes molecular complexity

Vinylidene complexes molecular structure

Water molecular complexity

© 2024 chempedia.info