11-14-11 - Chemistry 1A F11 11.14.11 Dr. Shaka...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
243 Chemistry 1A F11 11.14.11 Dr. Shaka Course Code 40000 Electronegativity vs. Formal Charge • Let’s consider the Lewis structure for carbon monoxide, CO. • As oxygen is more electronegative, we would expect it to be δ and carbon to be + . • But the formal charges seem to indicate the opposite! CO does have a dipole moment, but which is the positive end? 1 + 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
244 Chemistry 1A F11 11.14.11 Dr. Shaka Course Code 40000 Experimental Evidence • First, carbon monoxide forms metal carbonyls like Ni(CO) 4 (exam problem) and Fe (CO) 5 among others. • It also reacts with the iron in hemoglobin to cause carbon monoxide poisoning. • In all these compounds, the carbon sticks to the metal, not the oxygen. • In electric resonance spectra, the oxygen was found to be the positive end: so the formal charges in the Lewis structure are closer to reality than electronegativity.
Background image of page 2
245 Chemistry 1A F11 11.14.11 Dr. Shaka Course Code 40000 Bond Lengths and Strengths • If we make multiple bonds, we would
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/12/2011 for the course CHEM 1A taught by Professor Tobias during the Fall '01 term at UC Irvine.

Page1 / 11

11-14-11 - Chemistry 1A F11 11.14.11 Dr. Shaka...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online