Here, we report the systematic synthesis and characterization of simple phenols bearing a trialkyl (aryl) silyl or trialkyl (aryl) germyl functional group as a hydrophobic substituent. These silicon and germanium analogues exhibited higher hydrophobicity than the corresponding carbon analogues, with a difference in log P value of approximately 0.6, independent of the alkyl (aryl) species. Trimethylsilylphenol and trimethylgermylphenol ...