Bugs item #3273118, was opened at 2011-04-03 23:21
Message generated for change (Tracker Item Submitted) made by jiahao
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Jiahao Chen (jiahao)
Assigned to: Nobody/Anonymous (nobody)
Summary: Wrong spin computed for lithium atom in XYZ -> QChem input

Initial Comment:
For some reason babel treats the hydrogen atom differently from the lithium 
atom in the xyz parser.

This is what happens for lithium

$ babel -ixyz li.xyz -oreport
FILENAME: li.xyz
FORMULA: Li
MASS: 6.9410
EXACT MASS: 7.0160045
INTERATOMIC DISTANCES
...

$ babel -ixyz li.xyz -oqcin 
$comment
li.xyz
$end

$molecule
0 1
3 0 0 0
$end

$rem

$end
1 molecule converted
12 audit log messages 

And this is what happens for the hydrogen atom:


$ babel -ixyz test.xyz -oreport
FILENAME: test.xyz
FORMULA: H
MASS: 1.0079
EXACT MASS: 1.0078250
TOTAL SPIN: 2
INTERATOMIC DISTANCES
...

$ babel -ixyz test.xyz -oqcin 
$comment
test.xyz
$end

$molecule
0 2
1 0 0 0
$end

$rem

$end
1 molecule converted
11 audit log messages 

As can be seen, the Q-Chem input file for the lithium atom has the wrong 
multiplicity (1=singlet) instead of the expected 2.

Running with ---errorlevel 5, it appears that the lithium atom XYZ input 
triggers OpenBabel::AssignImplicitValence but not the hydrogen atom XYZ input.

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