31. When calculating a 2 plane bend you must know the bend angle and rotation ( dihedral angle ). 32. The dihedral angles ( ?, ? ) are about ( 120? 115?) in parallel sheets. 33. The aerodynamic stabilizing qualities of a dihedral angle were described in an influential 1810 article by Sir George Cayley. 34. In the case of a pyramid of zero height, the dihedral angle is 0?( or 180?). 35. Within each type, turns may be further classified by their backbone dihedral angles ( see Ramachandran plot ). 36. It was developed after BINAP and was investigated since it has a narrower dihedral angle between the aromatic faces. 37. It has been shown that a dihedral angle of 120 best directs substrates which hydrogen bond with the directing group. 38. A dihedral angle ( also called the face angle ) is the internal angle at which two adjacent faces meet. 39. In contrast " Vinberg polytopes " in 3 dimensions or higher are completely determined by the dihedral angles . 40. Because not all amino acids have these dihedral angles , a Janin plot is not applicable to all such acids.
