title: Triphen-yl(prop-2-yn-1-yl)silane.
abstract: In the title compound, C(21)H(18)Si, the coordination geometry around the Si atom is a slightly distorted tetra-hedron with C-Si-C angles in the range 106.05 (11) to 110.58 (10) ° and Si-C bond lengths in the range 1.855 (2) to 1.883 (3) Å. The alkyne C-C bond length is 1.167 (4) Å. The dihedral angles between the three phenyl rings are 63.89 (7), 86.38 (7) and 70.51 (8)°. In the crystal, mol-ecules inter-act only by van der Waals forces.
authors.affiliation: Fakultät Chemie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund,  Germany.
authors.forename: Björn
authors.initials: B
authors.lastname: Nelson
authors.forename: Michaela
authors.initials: M
authors.lastname: Schulte
authors.forename: Carsten
authors.initials: C
authors.lastname: Strohmann
authors.forename: Hans
authors.initials: H
authors.lastname: Preut
authors.forename: Martin
authors.initials: M
authors.lastname: Hiersemann