This study discovers that the C(sp3) atoms on the methylene moiety can act as electrophilic sites in self-assembly processes and form bidentate tetrel bonds with nucleophiles. Experimental (X-ray structural analysis) and theoretical evidence (DFT calculations) have confirmed this finding.
C(sp3) atoms are known to act as electrophilic sites in self assembly processes, and in all cases reported till now, they form only one interaction with nucleophiles; that is, they function as monodentate tetrel bond donors. This manuscript reports experimental (X-ray structural analysis) and theoretical evidence (DFT calculations), proving that the methylene carbon in bis-pyridinium methylene salts establishes two short and directional C(sp3)center dot center dot center dot anion interactions; that is, they function as bidentate tetrel bond donors.
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