The relative permittivities of methanol (m.p. −95°C) corrected for density variation are given below. What molecular information can be deduced from these values? Take ρ = 0.791 g cm⁻³ at 20°C.

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Ꮎ/°C -185 Ꮛ 3.2 -170 -150 -140 3.6 4.0 5.1 -110 -80 67 57 -50 -20 4 43 0 38 20 34