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Hydrogen bonding
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The hydrogen bond is one specific kind of noncovalent interaction
The structure + properties of many biological molecules + of water are determined
by H bonds
A H bond is an interaction between a covalently bonded hydrogen atom on a donor
atom + a pair of nonbonded electrons on an acceptor atom
The atom to which hydrogen is covalently bonded to is called the hydrogen-bond
donor + the atom to with the nonbonded electron pair’s called the hydrogen-bond
acceptor
The interaction between the donor + acceptor is typically represented by a dotted
line between the acceptor atom + shared H
The ability of an atom to function as a hydrogen-bond donor depends greatly on its
electronegativity
The more electronegative the donor atom→ the more negative charge it withdraws
from the H to which its bonded→ so the H becomes more positive + more strongly
attracted to the electron pair of the acceptor



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