OK.  This file contains some complex syntax.  It would appear that rings have 
several entries to make sure that if they are read in a forward or reverse 
direction that they can still be recognized?

 Brian


> -----Original Message-----
> From: Noel O'Boyle [mailto:baoille...@gmail.com]
> Sent: Friday, August 23, 2013 12:17 PM
> To: Bennion, Brian
> Cc: openbabel-discuss@lists.sourceforge.net
> Subject: Re: [Open Babel] morpholine moiety protonation state
>
> I don't know if the morpholine should be protonated at not, but if you think 
> it should, you can edit 
> C:\Users\---\AppData\Roaming\OpenBabel-2.3.2\data\phmodel.txt as you like. 
> One way to do this is to copy it to your current directory, edit it and run 
> obabel from the command-line there. We would welcome any improvements to the 
> model.
>
> - Noel
>
> On 13 August 2013 20:51, Bennion, Brian <benni...@llnl.gov> wrote:
>> Hello,
>>
>> While trying to prepare a ligand for further calculations I find that one 
>> that contains a morpholine substituent is not protonated properly.   At 
>> physiological pH I would expect the nitrogen on the morpholine to be 
>> protonated.  Is this incorrect?
>> The coordinates are given below for the heavy atoms.
>>
>> The aliphatic nitrogen seems to be protonated properly.
>>
>> Thank you.
>> Brian
>>
>> ATOM   3529  C5  TIM A 401       3.037   1.145  51.139  1.00 45.16           
>> C
>> ATOM   3530  C6  TIM A 401       3.227   1.181  52.657  1.00 57.05           
>> C
>> ATOM   3531  O1  TIM A 401       2.525   0.109  53.257  1.00 58.33           
>> O
>> ATOM   3532  C2  TIM A 401       1.125   0.224  53.044  1.00 53.51           
>> C
>> ATOM   3533  C3  TIM A 401       0.710   0.379  51.570  1.00 51.17           
>> C
>> ATOM   3534  N4  TIM A 401       1.640   1.118  50.754  1.00 50.77           
>> N
>> ATOM   3535  C7  TIM A 401       1.306   1.594  49.509  1.00 53.55           
>> C
>> ATOM   3536  N8  TIM A 401       0.645   0.822  48.631  1.00 58.54           
>> N
>> ATOM   3537  S9  TIM A 401       0.376   1.667  47.251  1.00 55.87           
>> S
>> ATOM   3538  N10 TIM A 401       1.084   3.083  47.666  1.00 49.53           
>> N
>> ATOM   3539  C11 TIM A 401       1.554   2.967  48.898  1.00 52.80           
>> C
>> ATOM   3540  O12 TIM A 401       2.233   3.973  49.543  1.00 52.38           
>> O
>> ATOM   3541  C13 TIM A 401       2.227   5.300  48.941  1.00 43.69           
>> C
>> ATOM   3542  C14 TIM A 401       3.213   6.032  49.863  1.00 42.67           
>> C
>> ATOM   3543  O15 TIM A 401       3.888   7.083  49.235  1.00 42.10           
>> O
>> ATOM   3544  C16 TIM A 401       2.480   6.515  51.102  1.00 44.11           
>> C
>> ATOM   3545  N17 TIM A 401       3.043   7.593  51.881  1.00 48.54           
>> N
>> ATOM   3546  C18 TIM A 401       2.542   7.436  53.270  1.00 41.41           
>> C
>> ATOM   3547  C19 TIM A 401       2.600   8.757  54.024  1.00 44.38           
>> C
>> ATOM   3548  C20 TIM A 401       1.067   6.963  53.216  1.00 36.66           
>> C
>> ATOM   3549  C21 TIM A 401       3.404   6.393  54.011  1.00 46.82           
>> C
>>
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