Appendix I. Table of atom names for group probes

Atom nameBrief descriptionAtom nameBrief description
C1Aliphatic CH groupC1=sp2 CH aromatic or vinyl
C2Methylene CH2 groupC2=sp2 CH2 vinyl or olefin
C3Methyl CH3 groupC=Other sp2 carbons
CHAldehyde CH groupC1#Acetylenic sp CH group
CCarbonyl or amide carbonC0Other aliphatic carbons
C+1Guanidinium carbonC-1Carboxy carbon
C#Allyl or acetylenic carbonC:#Acetylenic anion carbon
    
N=N-substituted heterocycle NN0Nitro or di-Me-acetamide
N:#sp N with lone pair**N:=sp2 N with lone pair**
N:sp3 N with lone pair**N-:Anionic tetrazole N**
N#sp N without lone pairN:#sp N with lone pair
    
N1Neutral flat NH eg amide**N1+sp3 amine NH cation**
N1=sp2 Amine NH cation**N1:sp3 NH with lone pair**
NH=sp2 NH with lone pair**N1#sp NH **
    
N2Neutral flat NH2 eg amide**N2+sp3 amine NH2 cation**
N2=sp2 Amine NH2 cation**N2:sp3 NH2 with lone pair**
    
N3+sp3 amine NH3 cation**N+Quaternary sp3 nitrogen
    
O1Alkyl hydroxy OH group**OHPhenol or carboxy OH**
O-sp2 phenolate oxygen**Osp2 carbonyl oxygen**
O::sp2 carboxy oxygen atom**OESsp3 ester oxygen atom*
O=O of sulphate/sulphonamide**OC2Ether or furan oxygen**
OSO of sulphone/sulphoxide**ONOxygen of nitro group
    
SNeutral sulphurS1Neutral SH group
S+1Sulphonium sulphurS-1S in mono-anion
SENeutral seleniumSE1Neutral SeH group
SE-1Se in mono-anionSE-2Se in dianion
    
FOrganic fluorine atomCLOrganic chlorine atom
BROrganic bromine atomIOrganic iodine atom
BNeutral trivalent BoronB-1Boron in mono-anion
PNeutral PhosphorusP+1P in mono-cation
P-1P in mono-anionP-2P in dianion
ASNeutral ArsenicSBNeutral Antimony

NOTE: All these names may be used in the Group Probe for Programme GLUE. We recommend that atoms marked with two stars ** should be regarded as polar. They may be used to generate Grid Maps as input data for GLUE.

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