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I have read from several sources about sucrose and some say it is 2 glucose molecules and some others say it is 1 glucose molecule and 1 fructose molecule.

I know that both of these are related disaccharides since they have the same molecular formula of $\ce{C12H22O11}$

So which one is actually sucrose and what is the other disaccharide.

Caters
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  • This was discussed recently here on Chemistry SE http://chemistry.stackexchange.com/questions/14562/why-do-other-sugars-melt-whereas-sucrose-decomposes I checked a number of other links and all agree that sucrose is glucose + fructose – ron Aug 12 '14 at 14:39
  • I don't think it is a duplicate because it is about the structure of 2 related sugars, not the melting point of sugars. – Caters Aug 12 '14 at 14:40
  • Yes, but the link shows the structure of sucrose and identifies the two monosaccharides. – ron Aug 12 '14 at 14:41
  • but several sources I have read said that sucrose is glucose + glucose. – Caters Aug 12 '14 at 14:42
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    maltose is glucose+glucose – ron Aug 12 '14 at 14:44
  • @ron - it is true that the answer can be found in other places, but that doesn't make this a duplicate question. OP is asking directly about the structure, so to be a duplicate, the other question (not answer) would have to be about the structure of glucose as well. – thomij Aug 12 '14 at 19:41
  • @caters - if you would link or reference your sources, someone can probably help clear up your confusion. At this point all anyone can say is "if your source says sucrose is two glucose molecules, then your source is wrong." – thomij Aug 12 '14 at 19:42

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Sucrose is composed of one glucose and one fructose monosaccharide. Two glucose molecules form maltose.

Dave Coffman
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