NMR Background and Experimental Methods

An isotope that possesses a nuclear spin 1/2 is NMR-active a majority of elements on the periodic table have at least one isotope that fulfills this 

The QI can be treated as a first- and second-order perturbation of the fundamental Zeeman interaction that describes nuclear spin energy levels in a magnetic field. The QI leads to a significant increase in i powder pattern 

Local symmetry about Ti is intimately related to the magnitude of the QI. When the electric charge distribution about titanium is perfectly spherically symmetric, there is no EFG at titanium, and SSNMR spectra are not 

Cq measures the magnitude of coupling between Q and the EFG, and is defined such that  

The dimensionless /q describes the axial symmetry of the EFG tensor and electronic environment about Ti, and is calculated according to  

---