Capped trigonal prismatic molecular geometry

{{Infobox molecular geometry

| Examples=Potassium heptafluorotantalate

| Image_File=MonocappTrigPrism.CapRightps.png

| Symmetry_group=C_2v

| Atom_direction=7

| Bond_angle=

| mu=

}}

In chemistry, the capped trigonal prismatic molecular geometry describes the shape of compounds where seven atoms or groups of atoms or ligands are arranged around a central atom defining the vertices of an augmented triangular prism. This shape has C_2v symmetry and is one of the three common shapes for heptacoordinate transition metal complexes, along with the pentagonal bipyramid and the capped octahedron.{{cite journal

| title = Seven-coordination. A molecular orbital exploration of structure, stereochemistry, and reaction dynamics

| author1 = Roald. Hoffmann

| author2 = Barbara F. Beier

| author3 = Earl L. Muetterties

| author4 = Angelo R. Rossi

| journal = Inorganic Chemistry

| year = 1977

| volume = 16

| issue = 3

| pages = 511–522

| doi = 10.1021/ic50169a002

}}Wells A.F. (1984) Structural Inorganic Chemistry 5th edition Oxford Science Publications {{ISBN|0-19-855370-6}}

Examples of the capped trigonal prismatic molecular geometry are the heptafluorotantalate ({{chem|TaF|7|2−}}) and the heptafluoroniobate ({{chem|NbF|7|2−}}) ions.{{cite journal

| title = "Non-VSEPR" Structures and Bonding in d(0) Systems

| first = Martin

| last = Kaupp

| journal = Angew Chem Int Ed Engl

| year = 2001

| volume = 40

| issue = 1

| pages = 3534–3565

| doi = 10.1002/1521-3773(20011001)40:19<3534::AID-ANIE3534>3.0.CO;2-#

| pmid = 11592184

}}{{cite journal

| title = Stereochemistry of Seven-Coordinate Main Group and d0 Transition Metal Molecules

| author1 = Zhenyang Lin

| author2 = Ian Bytheway

| journal = Inorganic Chemistry

| year = 1996

| volume = 35

| issue = 3

| pages = 594–603

| doi = 10.1021/ic950271o

}}