A2 2 Definitions Flashcards
Transition metals
An element which forms at least one stable ion with a partially filled d subshell
Ligand
An ion or molecule with a lone pair of electrons which forms a co-ordinate bond with a central atom or ion complex
Metal complex
A central metal atom or ion with ligands bonded by co-ordinate bonds
Co-ordination number
The number of co-ordinate bonds to a central metal atom or ion complex
Monodentate ligand
A ligand which uses only one lone pair of electrons to form a co-ordinate bond with a central metal atom or ion in a complex
Bidentate ligand
A ligand which uses two lone pairs of electrons to form two co-ordinate bonds with a central metal atom or ion in a complex
Polydentate ligand
A ligand which uses many lone pair of electrons to form more than two co-ordinate bonds with a central metal atom or ion in a complex
Base peak
Peak of greatest abundance in a mass spectrum
Molecular ion peak
A peak produced by an ion formed by the removal of one electron from a molecule
M+1 peak
A peak produced by a molecular ion with an increased mass due to the presence of one carbon-13 atom
Fragmentation ion
A positively charged ion produced when the molecular ion breaks apart
Low resolution nmr
A spectrum which does not show the spin spin splitting pattern
High resolution nmr
A spectrum which does show the spin spin splitting pattern
Doublet
A signal which appears as a pair of lines of equal intensity
Triplet
A signal which appears as three lines in the approximate intensity ratio (1:2:1)
