Page 82 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)

T A B L E V T A B L E S

Table V Geometrical and structural affixes
Except for those denoted by Greek letters, geometrical and structural affixes are italicized. All are
separated from the rest of the name by hyphens.

antiprismo eight atoms bound into a r egular antiprism
arachno a b oron structure intermediate between nido and hypho in degree of openness
asym asymmetrical
catena a c hain structure; often used to designate linear polymeric substances
cis two groups occupying adjacent positions in a c oordination sphere
closo a c age or closed structure, especially a b oron skeleton that is a p olyhedron
having all faces triangular
cyclo a r ing structure. (Here, cyclo is used as a m odifier indicating structure and
hence is italicized. In organic nomenclature, ‘cyclo’ is considered to be part of
the parent name since it changes the molecular formula. It is therefore not
italicized.)
d (delta) denotes the absolute configuration of chelate ring conformations
D (delta) a s tructural descriptor to designate deltahedra, or shows absolute configuration
dodecahedro eight atoms bound into a d odecahedron with triangular faces
Z (eta) specifies the bonding of contiguous atoms of a l igand to a c entral atom
fac three groups occupying the corners of the same face of an octahedron
hexahedro eight atoms bound into a h exahedron (e.g. cube)
hexaprismo twelve atoms bound into a h exagonal prism
hypho an open structure, especially a b oron skeleton, more closed than a klado
structure but more open than an arachno structure
icosahedro twelve atoms bound into an icosahedron with triangular faces
k (kappa) specifies the donor atoms in a l igand
klado a v ery open polyboron structure
l (lambda) signifies, with its superscript, the bonding number, i.e. the sum of the number of
skeletal bonds and the number of hydrogen atoms associated with an atom in a
parent compound; denotes the absolute configuration of chelate ring
conformations
L (lambda) shows absolute configuration
mer meridional; three groups occupying vertices of an octahedron so that one is cis
to the other two which are themselves mutually trans
m (mu) signifies that a g roup so designated bridges two or more coordination centres
nido a n est-like structure, especially a b oron skeleton that is almost closed
octahedro six atoms bound into an octahedron
pentaprismo ten atoms bound into a p entagonal prism
quadro four atoms bound into a q uadrangle (e.g. square)
sym symmetrical
tetrahedro four atoms bound into a t etrahedron
trans two groups occupying positions in a c oordination sphere directly opposite each
other
triangulo three atoms bound into a t riangle
triprismo six atoms bound into a t riangular prism

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