Complexes of the [K(18-Crown-6)]<sup>+</sup> Fragment with Bis(tetrazolyl)borate Ligands: Unexpected Boron−Nitrogen Bond Isomerism and Associated Enforcement of κ<sup>3</sup>-N,N′,H-Ligand Chelation Dongmei Lu Charles H. Winter 10.1021/ic100959j.s001 https://acs.figshare.com/articles/dataset/Complexes_of_the_K_18_Crown_6_sup_sup_Fragment_with_Bis_tetrazolyl_borate_Ligands_Unexpected_Boron_Nitrogen_Bond_Isomerism_and_Associated_Enforcement_of_sup_3_sup_N_N_H_Ligand_Chelation/2755846 The syntheses and solid-state structures of K(BH<sub>2</sub>(RCN<sub>4</sub>)<sub>2</sub>)(18-crown-6) (R = H, Me, NMe<sub>2</sub>, and NiPr<sub>2</sub>) are described. Complexes where R = H and Me have B−N bonds to N<sup>1</sup> of the tetrazolyl groups and form one-dimensional polymers, whereas those with R = NMe<sub>2</sub> and NiPr<sub>2</sub> possess isomeric B−N bonds to N<sup>2</sup> of the tetrazolyl moieties and adopt chelating κ<sup>3</sup>-N,N′,H-coordination modes to the potassium ion. 2010-07-05 00:00:00 polymer Ligand Associated Enforcement Isomerism tetrazolyl moieties N 1 isomeric N 2 tetrazolyl groups Fragment Boron chelating Bis NMe 2 Complexe synthese NiPr 2 Bond Unexpected potassium ion mode ChelationThe bond