Aldehydes

=Aldehydes= James Powers, Alex Serino, Taylor Manzi, and Kelly Oliver media type="file" key="aldehydes.m4a" width="271" height="271"

Hey guys, I set up a basic structure to make organization easier. I think it would be a good idea if we either assigned people to work on certain topics and set a deadline for when we want them finished by or we could just all add information to all of them. Then, we should set a date to get together to work on our script rather than over the internet. I was thinking we could do it over the weekend because everyone is busy with sports during the week days. Don't forget to add all of your sources to the bibliography. These are just some of my ideas; feel free to add your own. - James

That sounds good... i just added some information to the structure and examples. The examples with the pictures of the structures i found on http://www.docbrown.info/page06/AldehydesKetones.htm. that website had a lot of information. I also added the definition of the aldehyde, i also added to existance in nature and use. - alex I think it's a good idea to assign people certain topics to work on and we can add information to each others topics if we find anything. It doesn't matter to me what I do just let me know. - Kelly

What is an aldehyde?
A class of organic compounds which have a -CH=O, carbonyl group at the end of a carbon chain. Aldehydes are highly reactive chemical compounds. They are formed from alcohols. They can be made by natural processes or synthetically. Health effects caused by aldehydes vary depending on the length of the chain and the presence of a carbon (aromatic) ring.

//This definition was found on the third site in the bibliography//

Origin
The word //aldehyde// is derived from //**al**cohol **dehyd**rogenated.//

Examples of some aldehydes

 * 1)  methanal (formaldehyde)**, [[image:http://www.docbrown.info/page15/Image1877.gif width="45" height="19"]], [[image:http://www.docbrown.info/page15/Image1878.gif width="60" height="20"]], [[image:http://www.docbrown.info/page15/Image1879.gif width="58" height="45"]]**
 * 2)  ethanal (acetaldehyde)**, [[image:http://www.docbrown.info/page15/Image1880.gif width="63" height="24"]], [[image:http://www.docbrown.info/page15/Image1881.gif width="79" height="44"]], [[image:http://www.docbrown.info/page15/Image1882.gif width="84" height="49"]], [[image:http://www.docbrown.info/page15/Image1883.gif width="28" height="44"]]**
 * 3)  propanal (propionaldehyde)**, [[image:http://www.docbrown.info/page15/Image1884.gif width="90" height="22"]], [[image:http://www.docbrown.info/page15/Image1885.gif width="121" height="41"]], [[image:http://www.docbrown.info/page15/Image1886.gif width="111" height="56"]], [[image:http://www.docbrown.info/page15/Image1887.gif width="41" height="43"]]**
 * 4)  2-methylpropanal (2 not strictly needed but advisable, 2-methypropionaldehyde)**,**
 * **[[image:http://www.docbrown.info/page15/Image1888.gif width="106" height="27"]], [[image:http://www.docbrown.info/page15/Image1889.gif width="108" height="60"]], [[image:http://www.docbrown.info/page15/Image1890.gif width="42" height="57"]]**
 * 1)  butanal (butyraldehyde)**, [[image:http://www.docbrown.info/page15/Image1891.gif width="118" height="23"]], [[image:http://www.docbrown.info/page15/Image1892.gif width="168" height="43"]], [[image:http://www.docbrown.info/page15/Image1893.gif width="57" height="45"]]**
 * 2)  2-methylbutanal (2-methylbutyraldehyde)**, [[image:http://www.docbrown.info/page15/Image1894.gif width="152" height="60"]], [[image:http://www.docbrown.info/page15/Image1895.gif width="58" height="54"]]**
 * 3)  3-methylbutanal (3-methylbutyraldehyde)**, [[image:http://www.docbrown.info/page15/Image1896.gif width="154" height="53"]], [[image:http://www.docbrown.info/page15/Image1915.gif width="57" height="45"]]**
 * 4)  pentanal (old name 'valeraldehyde')**,[[image:http://www.docbrown.info/page15/Image1897.gif width="210" height="45"]], [[image:http://www.docbrown.info/page15/Image1898.gif width="73" height="45"]]**
 * 5)  [[image:http://www.docbrown.info/page15/Image1928.gif width="86" height="68"]] benzaldehyde (benzenecarbaldehyde), and **[[image:http://www.docbrown.info/page15/Image1929.gif width="83" height="74"]] 2-hydroxybenzaldehyde**

Structure of aldehydes
Aldehydes always have a hydrogen atom attached to the carbon of the carbonyl group -CHO

Nomenclature
__Aldehydes are named by the__ International Union of Pure and Applied Chemistry __(IUPAC) nomenclature by changing the suffix -e of the parent alkane to -al. Aliphatic aldehydes are named as derivatives of their longest alkyl chain__. For example, HCHO is derived from methane so it takes the name methanal as well as CH3CH2CH2CHO which is derived from butane, so it takes the name butanal. A second way of naming aldehydes is by taking the name of the carboxylic acid that corresponds to it. If −COOH appears instead of −CHO, then the aldehyde is usually given a name with the -ic acid ending. For example, -aldehyde ending takes the -ic acid ending.

Existence in nature
Examples of aldehydes existing in nature are, Cinnam aldehyde (cinnamon bark) and vanillin (vanilla bean). Aldehydes are commonly found in nature. __In water treatment, aldehydes are formed as disinfectant byproduct when ozone or chlorine is used as the disinfectant.__
 * (If it is underlined it is copied)**

Use of aldehydes
Aldehydes are used in the chemical industries to make things such as resins, organic acids, perfumes, and dyes.

Informational Sources

 * 1) http://en.wikipedia.org/wiki/Aldehyde
 * 2) http://www.docbrown.info/page06/AldehydesKetones.htm
 * 3) http://www.greenfacts.org/glossary/abc/aldehydes.htm
 * 4) http://www.experiencefestival.com/aldehyde_-_nomenclature
 * 5) http://www.britannica.com/EBchecked/topic/13527/aldehyde/277599/Structure-of-aldehydes

Picture Sources

 * 1) **http://www.biochemj.org/bj/361/0163/bj3610163f02.gif****
 * 2) http://www.daviddarling.info/images/aldehyde.png**
 * 3) http://www.docbrown.info/page06/AldehydesKetones.htm
 * 4) http://www.britannica.com/EBchecked/topic/13527/aldehyde/277599/Structure-of-aldehydes