transition metals Flashcards
d block element
one which forms at least 1 ion with a partially filled d-orbital
all transition metals form compound where oxidation state is…
2+
(often) higher the oxidation state the higher the
oxidising strength
trend in oxidation states across the series
increase towards manganese then decrease
properties of transition metals
1 - form coloured compounds in which transition metal has different oxidisation states
2 - form coloured compounds
3 - elements and compounds can act as catalysts
ligands
molecule or ion which donates electron pair to central metal ion forming coordinate bond or dative covalent bond
coordination number
number of coordinate bonds attached to a central metal ion
monodentate ligand
one which donates 1 pair of electrons
bidentate ligand
one which donates 2 pairs of electrons
where does cis trans isomerism occur?
some square planar and octahedral molecules
where does optical isomerism occur?
octahedral complex ions containing 2+ bidentate ligands