Page 30 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)

IR-10.2 O R G A N O M E T A L L I C C O M P O U N D S

21.
Me
Fe
OC Ph
Ph P
3
Me
5
carbonyl(Z -cyclopentadienyl)[(E)-3-phenylbut-2-en-
2-yl](triphenylphosphane)iron
(The Z term used here is explained in Section IR-10.2.5.1.)

22. Ph P py
3
Rh
Ph P C
3
CPh
(phenylethynyl)(pyridine)bis(triphenylphosphane)rhodium

23.
P
H P
Ru
P
P

bis[ethane-1,2-diylbis(dimethylphosphane-kP)]hydrido(naphthalen-
2-yl)ruthenium

= M e PCH CH PMe = e thane-1,2-diylbis(dimethylphosphane)
P P 2 2 2 2

IR-10.2.3 Compounds with several metal–carbon single bonds f rom one ligand

When an organic ligand forms more than one metal–carbon single bond (to one or more
metal atoms), t he ligand name may be derived from the name of the parent hydrocarbon
from which the appropriate number of hydrogen atoms have been removed. I n t he
systematic substitutive name, the suffix ‘diyl’ or ‘triyl’ is attached to the name o f t he parent
hydrocarbon if two or three hydrogen atoms, respectively, are replaced b y o ne or more m etal
atoms. There is no removal of the terminal ‘e’. T he locant ‘1’ is assigned so as to create the
longest chain of carbon atoms, and the direction of numbering is chosen to give the lowest
possible l ocants to side chains or substituents. The locant number(s) must always be cited,
except f or ligands derived from methane.
Alternatively, when c onsidering these l igands as anions, the endings ‘diido’ and ‘triido’
should be used. This nomenclature also a pplies to hypervalent coordination modes, e.g. for
bridging m ethyl groups. T ypical ligands forming two or three metal–carbon single bonds are
listed in Table IR-10.2.

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