Compare the nucleophilic strengths of the following two compounds:
According to me it should be the second one, that is, (2R,6R)-2,6-dimethyltetrahydropyran because the methyl groups would exert +I effect which would increase the electron density on the oxygen atom and hence it would become more nucleophilic, but the answer in my book is given as the first one. I don't understand why is it so. Is it because the effects of the methyl groups would cancel as they are connected in trans manner? But then I don't understand why would the first one still have a higher nucleophilicity.