Quantum chemical evaluation of the knee angle in the (5,5) - (9,0) coiled carbon tubule

Abstract
The knee angle of the (5,5) - (9,0) coiled carbon tubule was determined by the semi-empirical complete neglect of differential overlap technique and was found to be . The construction of this achiral knee is described by a simple formalism based on the heptagon - pentagon pair. The use of molecular mechanics techniques gave values of and with the CVFF and CFF91 force fields, respectively.