Jmol has some very odd bonding radii for unusual anions. Note the numbers:
(8 << 4) + (-2 + 4), 1320, // "O-2"
(8 << 4) + (-1 + 4), 1760, // "O-1" // WAY too large?
(14 << 4) + (-4 + 4), 2710, // "Si-4"
(14 << 4) + (-1 + 4), 3840, // "Si-1" // same problem here?
(34 << 4) + (-2 + 4), 1910, // "Se-2"
(34 << 4) + (-1 + 4), 2320, // "Se-1" // same problem here?
(50 << 4) + (-4 + 4), 2940, // "Sn-4"
(50 << 4) + (-1 + 4), 3700, // "Sn-1" // same problem here?
(52 << 4) + (-2 + 4), 2110, // "Te-2"
(52 << 4) + (-1 + 4), 2500, // "Te-1" // same problem here?
My question is, why would it be that the X(1-) numbers are way larger than
the X(2-) numbers?
I'm guessing "O(1-)" is for something like Na2O2, sodium peroxide. But
still, that makes no sense whatsoever. The reference reads:
* This data is from
* Handbook of Chemistry and Physics. 48th Ed, 1967-8, p. F143
* (scanned for Jmol by Phillip Barak, Jan 2004)
Can someone look that up, please? Where are these numbers really from?
The problem is that carboxylic acid salts are given a way too large maximum
bonding radius for their oxygen atoms.
I've temporarily set the O- bonding radius to 1000, but still....
Bob
--
Robert M. Hanson
Professor of Chemistry
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr
If nature does not answer first what we want,
it is better to take what answer we get.
-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900
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