CHM 124 Lecture Notes - Lecture 7: Electronegativity, Sigma Bond, Lone Pair

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amaranthtoad188

7 Dec 2017

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Document Summary

Counts 1 carbon atom, an means no c=c, al says that it is an aldehyde and. The simple view of the bonding in carbon - oxygen double bonds. Where the carbon-oxygen double bond, c=o, occurs in organic compounds it is called a carbonyl group. The simplest compound containing this group is methanal. We are going to look at the bonding in methanal, but it would equally apply to any other compound containing c=o. The interesting thing is the nature of the carbon-oxygen double bond - not what it"s attached to. If you wrote it as hcoh, it looks as if it contains an -o-h group - and it doesn"t. An orbital view of the bonding in carbon - oxygen double bonds. Just as in ethene or benzene, the carbon atom is joined to three other atoms. The carbon"s electrons rearrange themselves, and promotion and hybridisation give sp2 hybrid orbitals.

Related Questions

All of the statements concerning the carbonyl group in aldehydes and ketones are TRUE except:

A. The bond is polar, with a slight negative charge on the oxygen atom.

B. The bond angles about the central carbon atom are 120 degrees.

C. The carbonyl group is planar.

D. In condensed form the carbonyl groups can be written as -CHO or -CO-.

E. Because the bond is polar, carbonyl groups readily form hydrogen bonds with each other.

Name the heterocyclic substituent found in the molecule shown according to the general type of nitrogen-containing ring to which it belongs.
The structure of a compound is given as a Haworth projection. It is in furanose form, or a pentagon, with an at its top vertex. One can numerate carbon atoms clockwise starting from next to . Then a six-membered ring, , , and a group are attached above the plane of the ring to its carbons in the order of numeration. While , , , and are attached below this plane, correspondingly. The six-membered ring has a double bond between the second and third (clockwise) and between the fourth and fifth carbon atoms, an oxygen atom attached to the sixth carbon atom by a double bond, and an group attached to the fourth carbon atom. The first carbon atom of the six-membered ring is attached to the pentagon. The first and fifth members of the ring are nitrogen atoms. The group has the following structure: , with two minus ions attached to the P atom and a double bond between the P atom and the second (from left to right) atom.

Enter the name of the heterocyclic amine.