Spectroscopic Studies of Distorted Structure Systems in the Vibron Model: Application to Porphyrin and Its Isotopomers

Table 2

Values^(b) of algebraic parameters used in the calculation of C_m–H, C_b–C_b stretching modes of porphyrins and their isotopomers.

	Cm–H vibrational mode			Cb–Cb vibrational mode
	Ni (OEP)-^15N	Ni (OEP)-meso-d4	Ni (OEP)-methylene-d16	Ni (OEP)-^15N	Ni (OEP)-meso-d4	Ni (OEP)-methylene-d16
𝑁	44	44	44	140	140	140
𝐴	−17.6802	−17.6820	−17.614	−2.83	−2.835	−2.825
𝐴^′	−0.24	−0.25	−0.28	−1.223	−1.286	−0.452
λ	0.014	0.01136	0.009	0.086	0.068	0.067
𝜆^′	0.011	0.012	0.5685	0.047	0.092	0.020

^(b)All values in cm⁻¹ except N, which is dimensionless.