Register to reply

Which substance exhibits the most hydrogen bonding?

by Bipolarity
Tags: bonding, exhibits, hydrogen, substance
Share this thread:
Mar13-12, 08:50 PM
P: 783
1. The problem statement, all variables and given/known data

Which of the following substances exhibits significant hydrogen bonding in the liquid state?

A) [itex] CH_{2}F_{2} [/itex]
B) [itex] N_{2}H_{4} [/itex]
C) [itex] CH_{3}OCH_{3} [/itex]
D) [itex] C_{2}H_{4} [/itex]
E) [itex] C_{2}H_{2}[/itex]

2. Relevant equations

3. The attempt at a solution

I know that hydrogen bonding generally only works with hydrogen being attracted to a nonbonding pair on a very electronegative atom (N,F,O and Cl). So only A,B, and C can be the answer. The answer turns out to be B, but I really thought it would be A since flourine is the most electronegative.

I also don't understand whether being in the liquid state has any bearing on the problem.

Advice? Thanks for your time!

Phys.Org News Partner Science news on
Bees able to spot which flowers offer best rewards before landing
Classic Lewis Carroll character inspires new ecological model
When cooperation counts: Researchers find sperm benefit from grouping together in mice
Mar13-12, 10:11 PM
Other Sci
Sci Advisor
P: 1,378
In a hydrogen bond, you must have a hydrogen bond donor and a hydrogen bond acceptor. The donor requires a hydrogen covalently bound to either a fluorine, nitrogen or oxygen. The hydrogen bond acceptor requires a lone pair on a fluorine, nitrogen or oxygen.

Compound A is capable of acting as a hydrogen bond acceptor, but because the hydrogens are bound to the carbon, it is incapable of acting as a hydrogen bond donor.

Register to reply

Related Discussions
Hydrogen bonding for Fluorine Chemistry 16
Hydrogen bonding with NH3 .help.ASAP! Biology, Chemistry & Other Homework 4
Hydrogen bonding Biology, Chemistry & Other Homework 10
Can Hydrogen undergo PI bonding? Chemistry 7
Hydrogen Bonding Introductory Physics Homework 4