##############################################################################
#                                                                            #
#	                Open Babel file: aromatic.txt                        #
#                                                                            #
#  Copyright (c) 1998-2001 by OpenEye Scientific Software, Inc.              #
#  Some portions Copyright (c) 2001-2003 Geoffrey R. Hutchison               #
#  Part of the Open Babel package, under the GNU General Public License (GPL)#
#                                                                            #
#  SMARTS patterns with minimum and maximum pi-electrons contributed to an   #
#   aromatic system (used by typer.cpp:OBAromaticTyper)                      #
#                                                                            #
##############################################################################

#PATTERN		MIN	MAX

#carbon patterns
[#6D2r+,#6D3r+]		1	1
[#6r]=@*		1	1
[#6rD3]=!@*		1	1
[#6rD3]=!@[!#6]		0	0
[#6rD3-]		2	2

#nitrogen patterns
[#7r](-@*)-@*  		2	2
[#7rD2]=@*		1	1
[#7D3+]			1	1
[#7rD3]=O		1	1
[#7D2-]			2	2

#oxygen patterns
[#8r]			2	2
[#8r+]			1	1

#sulfur patterns
[#16rD2]		2	2
[#16rD2+]		1	1
[#16rD3]=!@O		2	2

#other misc patterns
# Accounts Chem Res 1978 11 p. 153
# phosphole, phosphabenzene (not v. aromatic)
[#15rD3]		2	2
# selenophene
[#34rD2]		2	2
# arsabenzene, etc. (*really* not v. aromatic)
#[#33rD3]		2	2
# tellurophene, etc. (*really* not v. aromatic)
#[#52rD2]		2	2
# stilbabenzene, etc. (very little aromatic character)
#[#51rD3]		2	2
