Re: TOJC...Dipoles-A Question
stoneag@PLU.edu
Mon, 16 Sep 1996 16:23:31 -0800 (PST)
I think that I might be able to help you Mr. Ross,
Looking back on page 6,7 I find that a covalend bond only occurs when
atoms are shared. With electronegativity the electrons are not being
shared equally and so there is more of an ioninc type bond. So I think
that a "polar covlaent bond" is just another way of saying a slight ionic
bond. So what! I think that all atoms have electronegativity when
compared to and if mixed with atoms of lesser electronegativity the net
dipole will be towards the lesser electronegative. When you join to atoms
of the same together there is no net dipole because they cancle each
other out. So when you mix any atoms together you wil have polar bonds,
just some of them will not be strong because the difference in
electronegativity will be smaller. Where the difference in
electrongativity is higher you would have a dipole moment unless the
dipoles were balcned by the shape of the molecule.
Ihope that I was able to help and not further confuse you.
Allister stone
On Sat, 14 Sep
1996 rossjm@PLU.edu wrote:
> Organic Journal Club-
>
> While looking over sections 1.18 and 1.19 again, I ran into a slight
> confusion about dipoles and dipole moments. Does a dipole have to have a
> dipole moment? Or are polar covalent bonds the only criteria for being a
> dipole? ( Keep in mind that molecules can have polar covalent bonds and
> no dipole moment. ) This really made me think, but I couldn't find an
> answer. Most likely the answer lies in a more specific definition of a
> dipole than what I could find in my books.
>
> My e-mail address is rossjm@plu.edu
>
> Thanks.
>
> Jessica Ross
>