## 4 Conclusions
The following supporting information can be downloaded at: [[https://www.mdpi.com/article/10.3390/app13020953/s1](https://www.mdpi.com/article/10.3390/app13020953/s1)]([https://www.mdpi.com/article/10.3390/app13020953/s1](https://www.mdpi.com/article/10.3390/app13020953/s1)), Transpiration method; Table S1: Results of transpiration method: absolute vapor pressures \(p\), standard molar vaporisation/sublimation enthalpies and standard molar vaporisation/sublimation entropies; Table S2: Compilation of data on molar heat capacities C\({}_{p,m}^{o}\)(cr or liq) and heat capacity differences \(\Delta_{\text{cr},\text{r}}^{g}\), C\({}_{p,m}^{o}\) at \(T\) = 298.15 K (in J.K\({}^{-1}\).mol\({}^{-1}\)); Table S3: Compilation of data on molar heat capacities C\({}_{p,m}^{o}\)(liq) and heat capacity differences \(\Delta_{\text{I}}^{g}\)C\({}_{p,m}^{o}\) at \(T\) = 298.15 K (in J.K\({}^{-1}\).mol\({}^{-1}\)); Adjustment of vaporisation/sublimation enthalpies to the reference temperature \(T\) = 298.18 K; Table S4: Vapor pressures, \(p_{i}\), at different temperatures compiled from the literature, standard molar vaporisation enthalpies, \(\Delta_{\text{I}}^{g}\)H\({}_{\text{m}}^{o}\), and standard molar vaporisation entropies, \(\Delta_{\text{I}}^{g}\)S\({}_{m}^{o}\); Empirical correlations: vaporisation enthalpies versus Kovats retention indices; Table S5: Correlation of the vaporisation enthalpies, \(\Delta_{\text{I}}^{g}\)H\({}_{\text{m}}^{o}\)(298.15 K), of alkyl-substituted benzenes with their Kovats indices (\(J_{x}\)) on Squalane; Table S6: Correlation of the vaporisation enthalpies, \(\Delta_{\text{I}}^{g}\)H\({}_{\text{m}}^{o}\)(298.15 K), of alkyl-substituted benzenes with their Kovats indices (\(J_{x}\)) on SPB-5; Table S7: Correlation of the vaporisation enthalpies, \(\Delta_{\text{I}}^{g}\)H\({}_{\text{m}}^{o}\)(298.15 K), of alkyl-substituted benzenes with their Kovats's indices (\(J_{x}\)) on CP-SIL; Table S8: Enthalpies of combustion and enthalpies of formation of alkyl-substituted benzenes reported in our earlier work and their uncertainties re-calculated in this paper (at \(T\) = 298.15 K (\(p^{o}\) = 0.1 MPa, in kJ\(\cdot\)mol\({}^{-1}\)); Table S9: Thermochemical data for alkyl-substituted biphenyls at \(T\) = 298.15 K (\(p^{o}\) = 0.1 MPa, in kJ\(\cdot\)mol\({}^{-1}\)); Table S10: Thermochemical data for alkyl-substituted biphenyls at \(T\) = 298.15 K (\(p^{o}\) = 0.1 MPa, in kJ\(\cdot\)mol\({}^{-1}\)); Table S11: Thermochemical data for alkyl-substituted biphenyls at \(T\) = 298.15 K (\(p^{o}\) = 0.1 MPa, in kJ\(\cdot\)mol\({}^{-1}\)); Table S12: Calculation of the quantum-chemical gas-phase enthalpies of formation using the well-balance reactions (WBR) at \(T\) = 298.15 K (in kJ.mol\({}^{-1}\)); Table S13: Calculation of the G3 MP2 _corrected_ gas-phase enthalpies of alkyl-benzenes at \(T\) = 298.15 K (in kJ.mol\({}^{-1}\)); Table S14: Calculation of the G4 _corrected_ gas-phase enthalpies of alkyl-benzenes at \(T\) = 298.15 K (in kJ.mol\({}^{-1}\)); Estimation of fusion enthalpies according to the Walden's Rule; Table S15: Calculation of the sublimation enthalpies, \(\Delta_{\text{cr}}^{g}\)H\({}_{\text{m}}^{o}\)(298.15 K), of tert-butyl-substituted benzenes in kJ\(\cdot\)mol\({}^{-1}\); Table S16: Calculation of the liquid phase enthalpies of formation, \(\Delta_{\text{r}}\)H\({}_{\text{m}}^{o}\)(liq), of the hydrogen-lean (HL) and hydrogen-reach (HR) counterparts of the LOHC systems based on alkyl-benzenes (at \(T\) = 298.15 K, \(p^{o}\) = 0.1 MPa, in kJ\(\cdot\)mol\({}^{-1}\)); Table S17: Calculation of the G3 MP2 _corrected_ gas-phase enthalpies of formation of alkyl-cyclohexanes at \(T\) = 298.15 K (in kJ.mol\({}^{-1}\)); Table S18: Correlation of vaporisation enthalpies, \(\Delta_{\text{I}}^{g}\)H\({}_{\text{m}}^{o}\)(298.15 K), of alkyl-cyclohexanes with their normal boiling temperatures (\(T_{b}\)). [6; 9; 10; 11; 12; 16; 18; 19; 20; 21; 22; 23; 31; 34; 36; 40; 43; 45; 47; 49; 56; 57; 64; 66; 67; 68]. Conceptualization, S.P.V. ; methodology, S.P.V., P.W. and K.M. ; software, A.A.S. and V.V.T.