Table 1. Calculated Bond Length and Dihedral Angle of DF-R and All Analyzed Molecules.

molecules	bond length (Lb) (Å)	dihedral angle (θs°)	dihedral angle (θa°)
DF-R	1.41		0.012
DF-M1	1.39	0.58	0.02
DF-M2	1.40	0.40	0.006
DF-M3	1.44	0.28	28.000
DF-M4	1.41	0.68	0.009
DF-M5	1.40	17.00	12.00
DF-M6	1.40	1.30	0.099