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Topic: Why is NH3 islobal with [Mn(CO)5]-  (Read 6419 times)

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Offline spirochete

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Why is NH3 islobal with [Mn(CO)5]-
« on: February 16, 2009, 12:18:17 PM »
The Mn in the complex is ligated by 5 molecules of CO.  How can this possibly be isolobal with NH3 which has three bonds to hydrogen and a lone pair? 

Offline sjb

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Re: Why is NH3 islobal with [Mn(CO)5]-
« Reply #1 on: February 16, 2009, 05:01:35 PM »
What do you understand by the term isolobal? Seems to me they are fairly similar - heavy atom and a lone pair?

http://en.wikipedia.org/w/index.php?title=Isolobal_principle&oldid=174678620

S

Offline spirochete

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Re: Why is NH3 islobal with [Mn(CO)5]-
« Reply #2 on: February 16, 2009, 07:22:31 PM »
It means the atoms share the same number of valence electrons and same orbital shapes.

Mn has a valence configuration of 3d54S1.  Nitrogen is 2S22p3

To be honest now that I try again to draw it I'm definitely not sure how the Manganese complex would even look so I can compare it to ammonia.  Could you help me out on that?

Offline macman104

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Re: Why is NH3 islobal with [Mn(CO)5]-
« Reply #3 on: February 16, 2009, 07:29:45 PM »

Offline sjb

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Re: Why is NH3 islobal with [Mn(CO)5]-
« Reply #4 on: February 18, 2009, 09:34:38 AM »
http://www.3dchem.com/inorganicmolecule.asp?id=1084 any use for visualizing the manganese complex?

Offline AWK

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Re: Why is NH3 islobal with [Mn(CO)5]-
« Reply #5 on: February 18, 2009, 09:44:25 AM »
AWK

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