Toward extension of the gas-phase basicity scale by novel pyridine containing guanidines

- The gas-phase basicities were measured by the entropy corrected kinetic method.
- Novel compounds - a useful set of the reference bases for further extension of the basicity scale.
- Experimental GBs correlate well with the pKHB of the H-bond accepting groups.
- The gas-phase basicities were calculated using MP2 and DFT approaches.