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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]

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eta or hapto (in inorganic nomenclature)
haem
Haber-Weiss reaction
halatopolymer
halato-telechelic polymer
half-chair
half-electron (HE) model
half life, t1/2
half life (of a radionuclide)
half-peak potential
half thickness (in radiochemistry)
half-wave potential
half-width (of a band)
halirenium ions
halochromism
haloforms
halohydrins
halonium ions
halophiles
hamiltonian operator
Hammett acidity function
Hammett equation (Hammett relation)
Hammond-Herkstroeter plot
Hammond principle (Hammond postulate)
handedness
Hansch analysis
Hansch constant
Hantzsch-Widman name
hapten
hapto
hard acid
hard amorphous carbon films
hard base
hard-segment phase domain
hard-sphere collision cross section
harmonic approximation
harmonic frequency generation
harmonic mean
harpoon mechanism
hartree
Hartree energy
Hartree-Fock limit
Hartree-Fock (Self-Consistent Field, SCF) method
Haworth representation
hazard
haze (in atmospheric chemistry)
haze horizon (in atmospheric chemistry)
health surveillance
heat, q, Q
heat capacity, C
heat capacity of activation
heat flux
heat of atomisation
heat of formation
heavy atom effect
heavy atom isotope effect
heavy water
hecto
height equivalent to an effective theoretical plate (h.e.e.t.p.) (in chromatography)
height equivalent to a theoretical plate (h.e.t.p.) (in chromatography)
helicenes
helicity
helion
helium-cadium laser
helium dead-space (in colloid and surface chemistry)
helium ionization detector (in gas chromatography)
helium-neon laser
helix
helix residue (in a polymer)
helix sense
Helmholtz energy (function), A
hemes (heme derivatives)
hemiacetals
hemiaminals
hemiketals
hemileptic
hemins
hemochromes
hemodialysis
hemoglobins
Henderson-Hasselbalch equation
henry
Henry's law
Herkstroeter plot
hertz
Herz compounds
hetarenes
hetaryl groups
hetarynes
heteroalkenes
heteroarenes
heteroaryl groups
heteroarynes
heterobimetallic complex
heterochain polymer
heteroconjugation
heterocumulenes
heterocyclic compounds
heterocyclyl groups
heterodetic cyclic peptide
heterodisperse
heteroexcimer
heterogeneity (in analytical chemistry)
heterogeneous catalysis
heterogeneous diffusion rate constant (in electrochemistry)
heterogeneous membrane electrode
heterogeneous nucleation
heteroleptic
heterolysis (heterolytic)
heterolytic bond cleavage
heterolytic bond-dissociation energy
heterolytic dissociative adsorption
heteropolysaccharide (heteroglycan)
heterotactic polymer
heterotactic triads (in polymers)
heterotopic
heterotrophic (organisms)
heterovalent hyperconjugation
hexagonal graphite
hexahedro- (in inorganic nomenclature)
hexaprismo- (in inorganic nomenclature)
hidden return
higher-order transition
highly oriented pyrolytic graphite
high-pressure graphitization
high-pressure mercury lamp (arc)
high resolution energy loss spectroscopy (HRELS)
high-spin
high-spin state
Hildebrand parameter
hindered rotation
histones
Hofmann rule
hold-back carrier
hold-up volume (in chromatography)
hold-up volume (time) (in column chromatography), VM, tM
hole burning
hole transfer
holoenzyme
Holtsmark broadening (of a spectral line)
homo
homoaromatic
homochain polymer
homochiral
homoconjugation
homocyclic compounds
homodetic cyclic peptide
homogeneity (in analytical chemistry)
homogeneous catalysis
homogeneous membrane electrode
homogeneous nucleation
homogeneous nucleus
homoleptic
homologous polymer blend
homolysis (homolytic)
homolytic dissociative adsorption
homomorphic
homopolymer
homopolymerization
homopolysaccharide (homoglycan)
homotopic
horizontal elution (horizontal development) (in planar chromatography)
host
host-vector system
hot atom
hot cell
hot ground state reaction
hot quartz lamp
hot state reaction
hour
Huckel (4n + 2) rule
H�ckel molecular orbital (HMO) theory
Huggins coefficient
Huggins equation
humidity (in atmospheric chemistry)
Hund rules
Hush model
HWHM (Half Width at Half Maximum)
hybridization
hybridoma
hydration
hydrazide hydrazones
hydrazide imides
hydrazides
hydrazidines
hydrazines
hydrazinylidenes
hydrazo compounds
hydrazones
hydrazonic acids
hydride
hydro
hydrocarbon cracking
hydrocarbons
hydrocarbylene groups
hydrocarbyl groups
hydrocarbylidene groups
hydrocarbylidyne groups
hydrocarbylsulfanyl nitrenes
hydrocracking unit
hydrodynamically equivalent sphere (in polymers)
hydrodynamic volume (in polymers)
hydrogen
hydrogen bond
hydrogen gas electrode
hydrolases
hydrolysis
hydrometeor (in atmospheric chemistry)
hydron
hydroperoxides
hydrophilic
hydrophilicity
hydrophobic interaction
hydrophobicity
hydropolysulfides
hydrosphere (in atmospheric chemistry)
hydrosulfides
hydroxamic acids
hydroximic acids
hydroxylamines
hygrometer
hygrometry (moisture analysis)
hyperchromic effect
hyperconjugation
hypersatellite (in X-ray spectroscopy)
hypho-
hypochromic effect
hypo-phase
hypsochromic shift
hysteresis

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