This alignment gives water a greater viscosity and also allows it to dissolve other polar molecules.Įthanol is an alcohol that contains an -OH group. The molecules align such that the hydrogen on one molecule will face the oxygen on another molecule. This imbalance causes the water molecule to have a positive and negative side, and hence, water is a polar molecule. This sharing gives the oxygen atom a slightly more negative charge, and the two hydrogens a slightly positive charge. Since it is more electronegative than hydrogen, oxygen pulls the shared electrons more closely to itself. The water molecule consists of two hydrogen (H) atoms covalently bound to an oxygen (O) atom. The intermolecular hydrogen bond’s strength is most often estimated by measuring the equilibria between molecules containing donor and acceptor units in solutions. The hydrogen donors and acceptors are present in positions where they can interact. The hydrogen bond takes place between the two groups due to molecular geometry.Īn intermolecular hydrogen bond occurs between two or more separate molecules in a substance. Ethylene glycol (C 2H 4(OH) 2) has two hydroxyl (OH) groups.They must be within proximity of each other. For this to happen, both the hydrogen donor and hydrogen acceptor must be present within one molecule.
It occurs when two functional groups of a molecule can form hydrogen bonds with each other. Intramolecular Hydrogen BondĪn intramolecular hydrogen bond occurs within a single molecule.
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