polaritywebsites.rcc.edu/kime/files/2019/11/1a-lecture-13-dipole-moments.pdf · (acetone) h c02 h h...
TRANSCRIPT
![Page 1: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/1.jpg)
Polarity
![Page 2: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/2.jpg)
Electronegativity EN
•Describes an atom’s ability to compete for electrons with other atoms to which it is bonded.
![Page 3: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/3.jpg)
∆ E.N. gives a clue at so how ionic a compound is:Ex: HCl ∆ E.N. 3-2.1 = 0.9 vs. H-C 2.5-2.1 = 0.4HCl bond has more “ionic character” it is said to be more polar because Electrons are not shared equally.
![Page 4: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/4.jpg)
ΔEN =2.1-2.1=0
ΔEN =3-2.1 = 0.9
ΔEN =3.0-3.0=0
![Page 5: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/5.jpg)
bond has a “dipole” to poles one is slightlyPositive the other is slightly negative.
![Page 6: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/6.jpg)
ΔEN 0-.5 non polar, ΔEN 0.6-1.6 polar covalent, ΔEN 1.7< Ionic
![Page 7: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/7.jpg)
![Page 8: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/8.jpg)
• Δ EN for HCl
• 3.0 – 2.1 = 0.9
• Ionic character from graph 20%
![Page 9: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/9.jpg)
What is the ionic character for an KBr bond?
![Page 10: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/10.jpg)
Dipole
•Polar bond • Molecular dipole
• (Dipole moment)
![Page 11: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/11.jpg)
Look for polarity in a bondLook for symmetryIn a molecule
![Page 12: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/12.jpg)
![Page 13: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/13.jpg)
Think about the geometry
![Page 14: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/14.jpg)
![Page 15: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/15.jpg)
![Page 16: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/16.jpg)
![Page 17: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/17.jpg)
![Page 18: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/18.jpg)
![Page 19: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/19.jpg)
![Page 20: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/20.jpg)
Draw the Lewis structure for N3-
a. What is the electron geometry aroundthe central Nitrogen?
b. Does the ion have a dipole?
![Page 21: Polaritywebsites.rcc.edu/kime/files/2019/11/1A-lecture-13-dipole-moments.pdf · (acetone) H C02 H H Nonpolar: NO net dipole moment Net dipole 1.920 Net dipole 1.600 Net dipole 1.04](https://reader030.vdocuments.site/reader030/viewer/2022040104/5e4f8642af6b0f01f07069d7/html5/thumbnails/21.jpg)
Predict the shape and find the dipole moment
•HCN
•SO3
•CS2
•OCS
•SOCl2•POF3