Index

Modulated structures dictionary (msCIF) version 3.2.1

_geom_torsion.angle

Definition:

   
     Angle defined by the sites identified by _geom_torsion.id.
     The torsion-angle definition should be that of Klyne and Prelog.
     The vector direction *_label_2 to *_label_3 is the viewing
     direction, and the torsion angle is the angle of twist required
     to superimpose the projection of the vector between site 2 and
     site 1 onto the projection of the vector between site 3 and
     site 4. Clockwise torsions are positive, anticlockwise torsions
     are negative.
     Ref: Klyne, W. & Prelog, V. (1960). Experientia, 16, 521-523.

Type: Real

Units: degrees

Category:
geom_torsion