Solid state NMR technique has been applied in the study of three synthesized silatranyl carboxylic acid compounds. The ^1^3C, ^2^9Si and ^1^5N NMR chemical shifts of the compounds are obtained. The experimental results show that in the solid state the silatrane structures are distorted when there is a non-axial carboxyl substituent. In such cases, the strength of the N-Si dative bond is not normally reflected by the behavior of ^2^9Si and ^1^5N chemical shifts, and no hydrogen bond or salt is formed in the molecule. The experimental results and discussion are presented in detail.

Key words: SILTRANCES, NUCLEAR MAGNETIC RESONANCE, SOLIDS, COORDINATION BOND, NITROGEN, SILICON, CHEMICAL SHIFT, CONFIGURATION