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Size of Metal Carbonyls

  1. Sep 22, 2009 #1
    What is the size of iron pentacarbonyl, methylcyclopentadienyl-manganese-tricarbonyl, or dicobalt octacarbonyl? Where could I find a source on this information?

    I am aiming to fit the above carbonyls into a 29-34 angstrom pore, but I'd like to know if it's even possible given the size of the molecules.

    Wikipedia offers numbers based on a paper published in Inorganic Chemistry in 1977. The Co-Co distances is 2.5 angstroms and the Co-CO appears to be in the area of 1.8 angstroms. Does simple math tell me the diameter is no greater than 6.5 angstroms? How does the size of the atoms come into play?

    Thank you in advance!
     
  2. jcsd
  3. Sep 23, 2009 #2

    alxm

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    Crystal structure database, experimental data from papers, a quantum-chemical calculation, or even a ball-and-stick model.. Depending on how accurate you want it. (not very it'd seem).

    But I can say offhand that all those molecules should easily fit into a 30-Ångstrom pore.

    6.5 isn't a bad guess. In fact, I'd wager they'd all fit into boxes of 7x7x7 Å.

    Even the bulky methylcyclopentadienyl group is only about 5 Å from end-to-end (and it's flat).
     
  4. Sep 23, 2009 #3

    chemisttree

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    30 Angstroms is a big pore... but how big is the door?
     
  5. Sep 23, 2009 #4
    Great. Thank you for the information.
     
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