Forbid benzene double bonds from reacting in 2+2_cycloaddition_Cd

These reactions were the first to be added when
generating a hexylbenzene pyrolysis mechanism.  They
are definitely meant for double bonds that don't have
aromatic character.

Author: connie

input/kinetics/families/2+2_cycloaddition_Cd/groups.py

@@ -1786,3 +1786,39 @@
 """
 )
 
+
+forbidden(
+    label = "benzene_db",
+    group = 
+"""
+1 *1 Cd u0 {2,D} {6,S} 
+2 *2 Cd u0 {1,D} {3,S}
+3    Cd ux {2,S} {4,D}
+4    Cd ux {3,D} {5,S} 
+5    Cd ux {4,S} {6,D}
+6    Cd ux {5,D} {1,S} 
+""",
+    shortDesc = u"""Benzene doublebond *1 *2""",
+    longDesc = 
+u"""
+Banning the doublebond within Benzene from reacting in 2+2 cycloaddition.
+""",
+)
+
+forbidden(
+    label = "benzene_doublebond",
+    group = 
+"""
+1 *3 Cd u0 {2,D} {6,S} 
+2 *4 Cd u0 {1,D} {3,S}
+3    Cd ux {2,S} {4,D}
+4    Cd ux {3,D} {5,S} 
+5    Cd ux {4,S} {6,D}
+6    Cd ux {5,D} {1,S} 
+""",
+    shortDesc = u"""Benzene doublebond *3 *4""",
+    longDesc = 
+u"""
+Banning the doublebond within Benzene from reacting in 2+2 cycloaddition.
+""",
+)