Table 4.

Regression models for molar refractivity of molecular structures.

Molar refractivity
Regression model	Molecular descriptor	R 2	F	Sig
Quadratic model	ABC(G)	0.991	143.296	0.000
	RA(G)	0.997	1202.58	0.000
	S(G)	0.995	701.649	0.000
	GA(G)	0.992	420.669	0.000
	H(G)	0.997	1052.56	0.000
	HM(G)	0.957	78.019	0.000
	F(G)	0.954	72.029	0.000
Cubic model	ABC(G)	0.991	368.122	0.000
	RA(G)	0.997	1202.59	0.000
	S(G)	0.995	703.808	0.000
	GA(G)	0.992	253.784	0.000
	H(G)	0.997	1052.56	0.000
	HM(G)	0.960	47.888	0.000
	F(G)	0.955	42.881	0.000
Logarithmic model	ABC(G)	0.947	143.2963	0.000
	RA(G)	0.948	146.356	0.000
	S(G)	0.942	130.513	0.000
	GA(G)	0.932	109.657	0.000
	H(G)	0.939	122.952	0.000
	HM(G)	0.840	42.080	0.000
	F(G)	0.835	40.352	0.000
Exponential model	ABC(G)	0.937	117.989	0.000
	RA(G)	0.947	141.900	0.000
	S(G)	0.947	142.275	0.000
	GA(G)	0.946	139.837	0.000
	H(G)	0.950	151.964	0.000
	HM(G)	0.886	62.339	0.000
	F(G)	0.875	56.014	0.000