Supporting Information Volumetric and ultrasonic studies on interactions of glycol in aqueous solutions of xylitol at different temperatures Nabaparna Chakraborty, 1 Kirandeep Kaur 1 , Kailash Chandra Juglan 1*, Harsh Kumar 2 1 Department of Physics, Lovely Professional University, Phagwara, 144401, Punjab, India. 2 Department of Chemistry, Dr B R Ambedkar NIT, Jalandhar 144 011, Punjab, India *Corresponding authors e-mail: kc.juglan@lpu.co.in, h.786.man@gmail.com 1.1 Partial molar volume of transfer The transfer volume of glycols from water to the aqueous Xylitol solutions at infinite dilutions was computed with the following formula Δ = (in aqueous Xylitol)- (water) (eq 1)  0   0   0  The calculated Δ values are indexed in Table S1, which suggests the strong ion-ion  0  interaction among glycols and xylitol. The positive Δ infers the strong molecular  0  interaction among xylitol and glycols and a non-uniform trend has been observed in values. In accordance with the structure of pure water it is considered that clathrates, which are the empty spaces available in the water structure can be easily infiltrate by the other molecules as propose by Pauling 1 . In order to maintain the cage structure of water, the glycols must empty areas but instead it abolishes the cage structure and probably new structure is formed as the water and the organic molecule undergoes hydrogen bond formation. The ion-hydrophobic interaction is evident by the negative Δ values, and  0  the positive values suggest the ion-hydrophilic interaction and hydrophilic-hydrophilic interaction simultaneously, corresponding to the co-sphere overlap model 2,3,4 . 1.2 Temperature dependent partial molar volume