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BCHE 395-2 2014 Weak Interactions

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Unformatted text preview: the- force- luke- 2dcf87d1- sz353x500- animate.jpg Hydrogen Bonds •  Hydrogen bonds are NOT covalent bonds •  Defini2on: Interac2on between covalently bonded Hydrogen atom on a Donor molecule X which is electronega2ve… –  X = O, N •  …And a pair of non- bonded electrons in an Acceptor atom Y, which is also electronega2ve –  Y = O, N, S Common H- bonds C H •  Hydrogen acceptor: usually O or N (lone pair of electrons) •  Hydrogen donor: H covalently bonded to another electronega2ve atom H- bonds are Biologically Important Func5onal Group Interac5ons! δ- δ+ Polar Interac5ons The Four Weak Interac2ons (Aqueous) •  Approx. bond energy •  Covalent C-H; C-O; C-N; C-C –  290-470kJ/mol •  H-bond –  50-60 kJ/mole •  Electrostatic interactions –  30-35 kJ/mole for chargecharge –  20-...
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