- No functional group
- Primary alcohols
- Primary amines
- Secondary amines
- Tertiary amines
- Ammonium
- Nitrile and isonitrile
- Hydrazine and hydrazone
- Carbamic acid, carbamates, hydrazides, amino alcohols, ketones, and ethers
- Organoboron, organic borates, lewis adducts, organic borate salts
- Thiols and thiophenols
- Sulfonates and sulfates
- Sulfides, disulfides, and polysulfides
- Thiocarbonyl, thiocarboxy, thioamide, and thiourea
- Thiocyanate and isothiocyanate
- Sulfonamide
- S and other heteroatom heterocyclics
- Phosphates
- Silanes