Input interpretation
Lewis bases | vertex count
Vertex count rankings
1 | carbon monoxide | 2 2 | hydrogen | 2 3 | hydrogen sulfide | 3 4 | water | 3 5 | phosphine | 4 6 | ammonia | 4 7 | dimethyl sulfide | 9 8 | benzene | 12 9 | trimethylamine | 13 10 | N, N, N', N'-tetramethylethylenediamine | 24