Trigonal prismatic molecular geometry

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Trigonal prismatic molecular geometry
Prismatic TrigonalP.png
Examples W(CH3)6
Steric number 6
Coordination number 6
Bond angle(s) 95°, 85°
μ (Polarity) 0

In chemistry, the trigonal prismatic molecular geometry describes the shape of compounds where six atoms, groups of atoms, or ligands are arranged around a central atom, defining the vertices of a triangular prism.

Examples[edit]

Hexamethyltungsten (W(CH3)6) was the first example of a molecular trigonal prismatic complex.[1]

Some other transition metals have trigonal prismatic hexamethyl complexes, including both neutral molecules such as Mo(CH3)6 and Re(CH3)6 and ions such as Ta(CH
3
)
6
and Zr(CH
3
)2−
6
.[2]

The complex Mo(S−CH=CH−S)3 is also trigonal prismatic, with each S−CH=CH−S group acting as a bidentate ligand with two sulfur atoms binding the metal atom.[2] Here the coordination geometry of the six sulfurs around the molybdenum is similar to that in the extended structure of molybdenum disulfide (MoS2).

References[edit]

  1. ^ Housecroft, C. E.; Sharpe, A. G. (2004). Inorganic Chemistry (2nd ed.). Prentice Hall. p. 725. ISBN 978-0130399137. 
  2. ^ a b Housecroft, C. E.; Sharpe, A. G. (2004). Inorganic Chemistry (2nd ed.). Prentice Hall. ISBN 978-0130399137.