Write full (expanded) structures for each of the following...

Write full (expanded) structures for each of the following molecular formulas. Follow the guidelines of Problem $22.89 .$ (a) $\mathrm{C}_{2} \mathrm{H}_{6}$ (c) $\mathrm{CH}_{2} \mathrm{O}$ (e) $\mathrm{C}_{3} \mathrm{H}_{3} \mathrm{~N}$ (b) $\mathrm{CH}_{2} \mathrm{O}_{2}$ (d) HCN (f) $\mathrm{CH}_{4} \mathrm{O}$

Write full (expanded) structures for each of the following molecular formulas. Follow the guidelines of Problem $22.89 .$
(a) $\mathrm{C}_{2} \mathrm{H}_{6}$
(c) $\mathrm{CH}_{2} \mathrm{O}$
(e) $\mathrm{C}_{3} \mathrm{H}_{3} \mathrm{~N}$
(b) $\mathrm{CH}_{2} \mathrm{O}_{2}$
(d) HCN
(f) $\mathrm{CH}_{4} \mathrm{O}$

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Key Concepts

Molecular Formula

This concept involves knowing the types and numbers of atoms present in a compound, which is denoted by its molecular formula. It provides the basic building blocks but does not include any connection information about how atoms are bonded together.

Expanded Structural Formula

An expanded structural formula reveals the complete arrangement of atoms in a molecule, including all bonds and substituent groups. It displays the connectivities explicitly, allowing one to see the molecular geometry and to predict or explain chemical reactivity based on the position of different atoms.

Functional Groups Identification

In organic chemistry, certain groups of atoms within molecules, known as functional groups, are responsible for the characteristic chemical reactions of those molecules. Recognizing these groups, such as aldehydes, nitriles, or alcohols, aids in understanding the compound's reactivity and physical properties.

Isomerism

Isomerism in organic compounds refers to the phenomenon where compounds sharing the same molecular formula can have different structural arrangements, resulting in varied chemical and physical properties. Recognizing possible isomers is crucial when drawing expanded structures since the same formula may represent more than one unique molecule.

Transcript

00:01 Okay, so we're just to draw the structures of the following.

00:02 The first one is c2h6.

00:07 So we know the carbon can form four bonds.

00:10 So let's draw this first.

00:11 And then just add hydrogens to each of the carbons.

00:27 Next one is ch2o2.

00:34 So let's draw the carbon first.

00:37 And oxygen needs two bonds.

00:42 So we can start by, let's draw ketone first.

00:46 And then if we add an oxygen as well as a hydrogen we can add another hydrogen to this oxygen right here so we'll have a carbosol acid and just verify that we have four bonds as well we're good there and the formula for this is ch2 o2 x1 is slightly different it's ch2o so let's start with the ketone again and um so we only have one oxygen so let's replace the other oxygen that was here with the hydrogen, and then just add the other hydrogen there, so x1 is going to be hcn, so just drawing the carbon first, and we'll just draw a single bond to the nitrogen first.

01:50 So nitrogen needs three bonds, and then we're just going to add a hydrogen to the carbon to get four.

02:05 X1 is c3h3n.

02:10 Okay, so we can start by just drawing the carbons again, and we can first put the nitrogen at the end, or at the front going from right to left.

02:26 And we only have three hydrogens to work with.

02:29 So let's add another bond here...

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