AbstractThe29Si NMR subtituent chemical shifts of 14meta‐andpara‐substituted derivatives of phenyltrimethyl‐and phenoxytrimethyl‐silanes have been interpreted in a uniform manner. They are shown to depend not only on the local but also on the non‐local parts of the charge distribution around the resonating nucleus. While the local part is taken into account by the paramagnetic screening constant, the influence of the non‐local part can be described by the induced internal electric field and additional higher