HYDROGEN-BONDING EFFECTS BETWEEN POLYVINYLPYRROLIDONE (PVP), PVP (C6H9NO)N AND WATER, PVP-W, WERE STUDIED USING CALCULATED ELECTRIC FIELD GRADIENT (EFG) FOR OXEGEN AND HYDROGEN NUCLEI VIA Density functional theory. THE CALCULATIONS WERE CARRIED OUT AT THE B3LYP AND B3PW91 LEVELS WITH THE 6-311+G* BASIS SET VIA THE GAUSSIAN 03 PACKAGE. NUCLEAR QUADRUPLE COUPLING CONSTANTS, C (Q), AND ASYMMETRY PARAMETERS, H(Q), ARE REPORTED FOR 17O AND 2H IN PVP AND PVP-W. IT WAS SHOWN THAT BOTH EFG TENSORS ARE SENSITIVE TO HYDROGEN-BONDING INTERACTIONS, NQR PARAMETERS OF 17O AND 2H UNDERGO SIGNIFICANT CHANGES FROM PVP TO PVP-W AND CALCULATING BOTH TENSORS IS AN ADVANTAGE LOWER VALUES OF QUADRUPOLE COUPLING CONSTANTS OF ASYMMETRY PARAMETERS IN THE PVP-W. THE DIFFERENCE IN THE QUADRUPOLE COUPLING CONSTANT C (Q) BETWEEN PVP AND PVP-W WAS ANALYZED IN DETAIL AND HB MIGHT BE IMPORTANT FACTORS IN THE INTERACTION BETWEEN PVP AND WATER.