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IUPAC Compendium of Chemical Terminology

 

[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M]
[N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z]

> Back to index

alpha-expulsion (in photochemistry)
E, Z
early-downhill surface
eclipsed (eclipsing)
eclipsing conformation
eclipsing strain
ectohormone
eddy
eddy dispersion (diffusion)
educt
effective cadmium cut-off energy (in nuclear analytical chemistry)
effective charge
effective chimney height (stack height)
effective half life
effectively infinite thickness (in flame spectroscopy)
effective molarity (effective concentration)
effectiveness
effective theoretical plate number (of a chromatographic column)
effective thermal cross-section
effective thickness of diffusion layer
effector
efficiency (of a step),
efficiency (of a counter)
efficiency of atomization (in analytical flame spectroscopy)
efficiency of nebulization (in flame spectrometry)
efficiency spectrum
efflorescence
effluent
effluent (in chromatography)
eicosanoids
eighteen-electron rule
einstein
Einstein equation
elastic collision
elastic scattering (in reaction dynamics)
elastic scattering (in spectrochemistry)
electrical arc
electrical double-layer
electrical hygrometer
electrically conducting polymer
electric capacitance
electric charge, Q
electric coherence length (in thin films),
electric conductance, G
electric conductivity
electric current, I
electric current density, j
electric dipole moment, p
electric displacement, D
electric field (strength), E
electric mobility, u, mu
electric polarizability, alpha
electric potential difference (of a galvanic cell), DV
electric potential, V
electric resistance, R
electric resistivity
electric sector (in mass spectrometry)
electrified interphase
electroactive substance
electrocapillarity
electrocapillary equation
electrochemical detector (in gas chromatography)
electrochemical method of detection (in analysis)
electrochemical potential
electrochemiluminescence
electrochromic effect
electrocyclic reaction
electrodecantation (or electrophoresis convection)
electrode current density, j
electrode memory
electrodeposition
electrode potential, E
electrode process
electrode reaction
electrode reaction rate constant
electrodialysis
electro-dialysis
electrofuge
electrogenerated chemiluminescence (ECL)
electroluminescence
electroluminescent polymer
electrolytic hygrometer
electromeric effect
electromigration
electromotive force, E
electron
Electron acceptor
electron affinity
electronation
electron attachment
electron capture
electron capture detector (in gas chromatography)
electron charge
electron configuration
electron correlation
electron-counting rules
electron-deficient bond
electron-deficient compounds
electron density
electron density function
electron detachment
electron donor
electron-donor-acceptor complex
electronegativity
electron energy (in mass spectrometry)
electroneutrality principle
electron exchange excitation transfer
electronically excited state
electronic chemical potential
electronic configuration
electronic effect of substituents: symbols and signs
electronic energy migration (or hopping)
electronic stability
electronic state
electron impact ionization (in mass spectrometry)
electron ionization (in mass spectrometry)
electron jump
electron kinetic energy
electron microscopy
electron-pair acceptor
electron-pair donor
electron paramagnetic resonance (EPR)
electron probe microanalysis (EPMA)
electron probe X-ray microanalysis (EPXMA)
electron rest mass
electron spectroscopy for chemical analysis (ESCA)
electron stopping power (in X-ray emission spectroscopy)
electron transfer
electron-transfer catalysis
electron transfer photosensitization
electronvolt
electron work function, phi
electro-osmosis (1972, 31, 620)
electro-osmosis (1996, 68, 1488)
electro-osmotic hold-up time (in capillary electromigration)
electro-osmotic mobility (in capillary electromigration)
electro-osmotic pressure
electro-osmotic velocity
electro-osmotic volume flow
electrophile (electrophilic)
electrophilicity
electrophoresis
electrophoresis convection
electrophoretic mobility, mu
electrophoretic velocity
electrophotography
electrosmosis
electrostatic filter
electrostatic precipitator
electrothermal atomizer (in spectrochemical analysis)
electroviscous effects
element
elementary charge
elementary entity
elementary particle (in nuclear chemistry)
elementary reaction
element effect
element of chirality
elimination
eluate
eluent
elute
elution
elution band (in chromatography)
elution chromatography
elution curve
elutriation
emanation thermal analysis
embryo
emission
emission (in atmospheric chemistry)
emission control equipment (in atmospheric chemistry)
emission flux (in atmospheric chemistry)
emission spectrum
emittance, epsilon
empirical formula
emulsifier
emulsion
enamines
enantioconvergence
enantioenriched
enantiomer
enantiomer excess (enantiomeric excess)
enantiomerically enriched (enantioenriched)
enantiomerically pure (enantiopure)
enantiomeric groups
enantiomeric purity
enantiomeric ratio
enantiomeric units (in a polymer)
enantiomerization
enantiomerism
enantiomorph
enantiomorphous structures (in polymers)
enantiopure
enantioselectivity
enantiotopic
enantiotopic mesophase
enantiotropic transition
encapsulation (in catalysis)
encounter
encounter complex
encounter control
encounter-controlled rate
encounter pair
endergonic (or endoergic) reaction
end-group
endocytosis
endoenzymes
endo, exo, syn, anti
endothermic reaction
end-point
end-to-end distance (in polymers)
end-to-end vector (in polymers)
ene reaction
energized species
energy, E
energy (of a radiation)
energy dispersion (in emission spectrometry)
energy dispersive detector
energy dispersive X-ray fluorescence analysis
energy flux density
energy gradient
energy hypersurface (synonymous with potential energy surface, PES)
energy migration
energy of activation
energy of activation (of an electrode reaction)
energy pooling
energy profile
energy resolution (in radiochemistry)
energy storage efficiency, eta
energy threshold (in radiochemistry)
energy transfer (in photochemistry)
energy transfer plot (in photochemistry)
energy yield of luminescence
enforced concerted mechanism
enhanced phosphorescence analysis (in luminescence spectroscopy)
enhancement reaction (in analytical chemistry)
enhancer
enolates
enols
enophile
enoses
enrichment factor (in liquid-liquid distribution), S
enrichment, isotopic
ent
entatic state
entering group
enthalpimetric analysis
enthalpimetric flow injection analysis
enthalpimetric titration
enthalpimetry
enthalpogram
enthalpy, H
enthalpy of activation
enthalpy of immersion
enthalpy of wetting
entitic
entitic quantity
entrainment (in atmospheric chemistry)
entrance channel
entropy, S
entropy of activation
entropy unit
envelope conformation
environmental (or ambient) monitoring
environmental stress cracking
enzyme activator
enzyme activity
enzyme induction (in general chemistry) (1992, 64, 152)
enzyme induction (in medicinal chemistry) (2004, 76, 1051)
enzyme inhibitor
enzyme repression
enzymes
enzyme substrate electrode
enzyme thermistor
enzymic decomposition
epicadmium neutrons
epigenetic
epihalohydrins
epimerization
epimers
epi-phase
episulfonium ions
epithermal neutrons
epitope
epoxides
epoxy compounds
equalization of electronegativity, principle of
equatorial
equilibration
equilibrium constant
equilibrium control
equilibrium dialysate
equilibrium distance (in a molecule)
equilibrium film
equilibrium geometry
equilibrium isotope effect
equilibrium reaction
equilibrium sedimentation
equilibrium solution
equivalence point
equivalence postulate (in polymer chemistry)
equivalent chain (in polymers)
equivalent diameter
equivalent entity
erg
error (of measurement)
erythro structures (in a polymer)
erythro, threo
ESCA
escape depth (for surface analysis techniques)
Esin and Markov coefficient
esters
ethers
ET-value
euatmotic reaction
eupeptide bond
eutectic reaction
evaluation function
evaporation
even-electron ion
evolved gas analysis (EGA)
evolved gas detection (EGD)
Ewens-Bassett number
exa
excess acidity
excess mass (at a solid/liquid interface)
excess Rayleigh ratio
excess volume (at a solid/liquid interface)
exchange current (of an electrode reaction)
exchange extraction
exchange integral
exchange-inversion transition
exchange labelling
exchange repulsion
excimer
excimer laser
excimer-luminescence (in luminescence quenching)
excipient (in toxicology)
exciplex
exciplex-luminescence (in luminescence quenching)
excitation
excitation-emission spectrum
excitation energy
excitation energy (in in situ microanalysis)
excitation level (in X-ray spectroscopy)
excitation spectrum
excitation transfer
excited state
exciton
excluded volume of a macromolecule (in polymers)
excluded volume of a segment (in polymers)
exclusion chromatography
exergonic (exoergic) reaction
exfoliated graphite
exfoliation
exitance
exit channel
exo
exoenzymes
exon
exothermic reaction
expansion factor (in polymers)
expectation value
expected value
experimental perturbational calculation
explosivity limits (explosion limits)
exponential decay
exposure (1982, 54, 1541)
exposure (2004, 76, 1051)
expression (in biotechnology)
extended-chain crystal (in polymers)
extended Hammett equation
extended Hückel MO method (EHMO)
extended X-ray absorption fine structure (EXAFS)
extender
extensive quantity
extent of an interface (surface)
extent of reaction, xi
external compensation
external heavy atom effect
external ion-pair return
external ion return
external photoelectric effect
external return
external standard (in chromatography)
external surface
exterplex
extinction
extinction coefficient
extra-column volume (in chromatography)
extract (n.)
extract (v.)
extractability (in solvent extraction)
extractant
extracting agent
extraction
extraction (in process liquid-liquid distribution)
extraction coefficient
extraction (equilibrium) constant
extraction factor
extraction fractionation (of polymers)
extraction isotherm
extraction process (in catalysis)
extrapolated range (in radiochemistry)
extremophiles
extrusion transformation
pi-electron acceptor/donor group
rho-sigma equation


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