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METAL CATION [6 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2017-08-14

English

Subject field(s)
  • Chemical Elements and Compounds
CONT

The observed azaphilic regioselectivity has been attributed, among other things, to the potentially chelating coordination of a Lewis acidic metal cation... by the substrate...

French

Domaine(s)
  • Éléments et composés chimiques
DEF

Se dit d'un composé présentant une affinité pour un atome d'azote.

OBS

Certains composés du bore, particulièrement azophiles, sont utilisés en synthèse organique.

OBS

azophile : terme et définition publiés au Journal officiel de la République française le 1er juillet 2017.

Spanish

Save record 1

Record 2 2013-11-13

English

Subject field(s)
  • Chemistry
OBS

Alkali Anions. Preparation and Crystal Structure of a compound Which Contains the Cryptated Sodium Cation and the Sodium Anion.... When a saturated solution of sodium metal in ethylamine in the presence of a cation-complexing bicyclic diamino ether("crypt") is cooled, crystals of [a stoichiometric sodium compound] form as thin hexagonal plates.... One of the sodium species is trapped in "crypt" and the other is outside.

French

Domaine(s)
  • Chimie
DEF

Retenir sélectivement des ions alcalins et alcalino-terreux.

CONT

Chaque cage moléculaire peut être adaptée à la taille de l'ion à «crypter» : tel cryptate qui retiendra parfaitement le potassium, ne retiendra ni le lithium (trop petit) ni le césium (trop gros).

Spanish

Save record 2

Record 3 2006-10-26

English

Subject field(s)
  • Chemistry
  • Geochemistry
DEF

The transforming of a metal cation into a new ion by the action of molecules containing at least one electron-donor group. [Definition standardized by ISO. ]

CONT

Fluorine expands the temperature interval between liquidus and solidus, lowers viscosity of magmas, and, through complexing, assists in the transport of elements, including those of economic interest.

OBS

complexing: term standardized by ISO.

PHR

Chemical complexing.

French

Domaine(s)
  • Chimie
  • Géochimie
DEF

Transformation d'un cation métallique en un ion nouveau, par l'intervention de molécules comportant au moins un groupement donneur d'électrons. [Définition normalisée par l'ISO.]

CONT

La présence de fluor accroît l'intervalle de température entre le liquidus et le solidus, réduit la viscosité des magmas et, par complexation, facilite le transport des éléments notamment ceux d'intérêt économique.

OBS

complexion : terme normalisé par l'ISO et l'AFNOR.

PHR

Complexation chimique.

Spanish

Save record 3

Record 4 2004-04-26

English

Subject field(s)
  • Chemical Elements and Compounds
CONT

carbonyl compounds: Metal carbonyls, in which carbon monoxide is a formal ligand.

PHR

Metal carbonyl anion, cation, cluster, complex, compound, derivative, fragment, species.

PHR

Infrared-active carbonylmetal probe group.

French

Domaine(s)
  • Éléments et composés chimiques
CONT

composé carbonylé : Métal carbonyle, dans lequel le monoxyde de carbone est un ligand formel.

CONT

Les métaux carbonyles sont des complexes formés par un métal de transition du groupe d et l'oxyde de carbone, de formule générique Mm(CO)n; «m» est compris entre 1 et 4; «n» entre 4 et 12, mais les valeurs 7 et 11 sont exclues; en outre, il existe le composé Rh6(CO)16.

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
Save record 4

Record 5 1996-12-06

English

Subject field(s)
  • Geochemistry
  • Chemistry
  • Environmental Studies and Analyses
CONT

Acidic substances are deposited directly to water surfaces and to the terrestrial components of the watershed that drain into those surface waters. The consequences of this input may include : elevation of major cation concentrations(Ca, Mg, perhaps Na, K) ;elevation of heavy metal concentrations(Al, Mn, Fe, possibly Zn) ;elevation of sulfate concentration; and reduction in water pH.

French

Domaine(s)
  • Géochimie
  • Chimie
  • Études et analyses environnementales

Spanish

Save record 5

Record 6 1985-11-05

English

Subject field(s)
  • Environmental Studies and Analyses
CONT

Acidic substances are deposited directly to water surfaces and to the terrestrial components of the watershed that drain into those surface waters. The consequences of this input may include : elevation of major cation concentration(Ca, Mg, perhaps Na, K) ;elevation of heavy metal concentrations(Al, Mn, Fe, possibly Zn) ;elevation of sulfate concentration; and reduction in water pH.

French

Domaine(s)
  • Études et analyses environnementales

Spanish

Save record 6

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