Abstract: In our previous works (see ECSOC-15, 2008; and also our accompanied communication №1) we found some interesting dependencies of ortho-protons chemical shift (δ_o^H) in monoalkylbenzenes NMR ¹H spectra upon the place and degree of branching of alkyl chain. If this branching takes place at the α-carbon atom, the shift of basic spectral parameter – δ_i^H (δ_o^H or δ_m^H) - is observed and entitled as "α-effect"; the branching at β-carbon atom leads to another type shift ("β-effect"). The positive value of α- or β-effect means that δ_i^H value increases with the increasing of amount of methyl groups in α- or β-position; contrary, negative value of such effect mean decrease δ_i^H value. The natural question emerges: which other classes of aromatic compounds (in addition to monoalkylbenzenes) the founded regularities apply to? Are α- and β-effects for meta-protons existed too? We obtain the answer while studying NMR ¹H spectra of 21 especially selected rows of disubstituted para-alkylaromatic compounds N_n of the general formula p-Y-C₆H₄-(CH₂)_r-CR¹R²R³ (where r=0 or r=1). We examined as substituents "Y" 21 the most widespread groups from most electronegative (NO₂) to most electropositive (NMe₂). The variable fragments (R¹, R², R³) given in general formula are only hydrogen atom or methyl group. Depending upon the place of alkyl chain branching all compounds we divide into two types: the compounds of A type (r=0 in general formula), where the branching takes place at α-carbon atom and compounds of B type branched at β-carbon atom (r=1). The differential spectral parameters (Δδ^Н_о) were used instead of basic ones (δ_о^Н). The Δδ^Н_о parameter means a difference between the value of studied proton chemical shift δ_i^Н,N(n) of the examined compound N_n and the same value δ_о^Н,N(0) of the standard compound, where all variable substituents R¹ = R² = R³ = Н. The δ_i^Н,N(0) and Δδ_i^Н parameter values of all A and B type compounds are demonstrated in 3 tables. Averaged values of differential parameters were calculated, tabulated in 2 tables and pictured on 2 diagrams. In our communication we have a broad discussion of values and signs calculated for all types averaged differential parameters. The regular "structure-property" dependencies (α- and β-effects) which earlier were founded only for monoalkylbenzenes δ₀^H,N(n) parameters, are also detected for δ₀^H,N(n) and δ_m^H,N(n) parameters of studied disubstituted para-alkylaromatic compounds. Such α- and β-effects were observed for all examined differential spectral parameters Δδ_i^H,N(n) in all investigated rows of disubstituted para-alkylaromatic compounds. It should be stressed that for the investigated rows of compounds 1-21 there are no facts contradicting with the predicting values and signs of both α- and β-effects. The similar regular "structure-property" dependencies are also examined for ¹³C NMR spectra parameters of the same disubstituted para-alkylaromatic compounds in our next communication №3, which we also want to sent now to ECSOC-15.