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Is there a chemical that has the bond structure like below?

enter image description here

There are 5 atoms linking together. Two of them have 4 bonds. (They are different atoms.) Another two of them have 3 bonds. (They can be either same or different atoms.) The last atom has only 2 bonds.

Are there such kinds of chemicals?

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Unlikely., based on what you've described. I'll wait to see the picture. –  Lighthart Feb 25 '13 at 5:46
    
@Lighthart: picture added –  ManishEarth Feb 25 '13 at 7:33
    
To clarify - does the structure have to be composed solely of carbon atoms? With no hydrogens? Or is it a saturated alkane? –  Richard Terrett Feb 25 '13 at 7:51
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The OP indicates that they can be different atoms. A compound with formula $\ce{C2B2O}$ has the correct valences to accomplish that structure, but I am unsure if it exists. –  Ben Norris Feb 25 '13 at 11:36
    
@BenNorris If it does, that is going to be one unhappy molecule, what with how far from tetrahedral that central carbon is. I suspect it would not exist for very long... –  Canageek Feb 25 '13 at 15:27
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