TY - JOUR
T1 - Homochiral column structure of rac- and Λ-[MIII(tn) 3]P3O9 (M = Co, Cr; Tn = 1,3-diaminopropane; P3O9 = cyclotriphosphate(3-)) produced by multiple hydrogen bonds
AU - Sunatsuki, Yukinari
AU - Miyahara, Sho
AU - Suzuki, Takayoshi
AU - Kojima, Masaaki
AU - Nakashima, Toshio
AU - Matsumoto, Naohide
AU - Galsbøl, Frode
PY - 2010/12
Y1 - 2010/12
N2 - The crystal structures of rac- and Λ-[MIII(tn) 3]P3O9·nH2O (M = Co, Cr; tn = 1,3-diaminopropane = trimethylenediamine; P3O9 = cyclotriphosphate(3-)) were determined by single-crystal X-ray analyses. In rac-[Co(tn)3]P3O9·7.3H2O, the [Co(tn)3]3+ cations with the same absolute configuration (Δ or Λ) and the P3O93- anions are alternately arrayed and connected by multiple NH⋯O hydrogen bonds to form a homochiral columnar structure. Adjacent homochiral columns with opposite chirality are connected by intercolumn hydrogen bonds to form a racemic pair of columns. The crystal structure of rac-[Cr(tn)3]P3O 9·7.5H2O is similar to that of the Co complex; however, there exist two types of racemic pairs of columns. In the crystal of Λ-[Co(tn)3]P3O9·2.5H 2O, a pair of columns consisting of alternately stacked Λ-[Co(tn)3]3+ cations and P3O 93- anions are linked by hydrogen bonds. Neighboring column pairs are further linked by hydrogen bonds to form a three-dimensional (3-D) sheet structure. The crystal structure of Λ-[Cr(tn) 3]P3O9·2.5H2O is isomorphous with the Co complex. The circular dichroism (CD) spectra of aqueous solutions of Λ-[M(tn)3]Br3 (M = Co, Cr) change when P 3O93- is added, and the changes were explained by ion pair formation through hydrogen bonds.
AB - The crystal structures of rac- and Λ-[MIII(tn) 3]P3O9·nH2O (M = Co, Cr; tn = 1,3-diaminopropane = trimethylenediamine; P3O9 = cyclotriphosphate(3-)) were determined by single-crystal X-ray analyses. In rac-[Co(tn)3]P3O9·7.3H2O, the [Co(tn)3]3+ cations with the same absolute configuration (Δ or Λ) and the P3O93- anions are alternately arrayed and connected by multiple NH⋯O hydrogen bonds to form a homochiral columnar structure. Adjacent homochiral columns with opposite chirality are connected by intercolumn hydrogen bonds to form a racemic pair of columns. The crystal structure of rac-[Cr(tn)3]P3O 9·7.5H2O is similar to that of the Co complex; however, there exist two types of racemic pairs of columns. In the crystal of Λ-[Co(tn)3]P3O9·2.5H 2O, a pair of columns consisting of alternately stacked Λ-[Co(tn)3]3+ cations and P3O 93- anions are linked by hydrogen bonds. Neighboring column pairs are further linked by hydrogen bonds to form a three-dimensional (3-D) sheet structure. The crystal structure of Λ-[Cr(tn) 3]P3O9·2.5H2O is isomorphous with the Co complex. The circular dichroism (CD) spectra of aqueous solutions of Λ-[M(tn)3]Br3 (M = Co, Cr) change when P 3O93- is added, and the changes were explained by ion pair formation through hydrogen bonds.
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U2 - 10.1039/c0nj00270d
DO - 10.1039/c0nj00270d
M3 - Article
AN - SCOPUS:78649375402
VL - 34
SP - 2777
EP - 2784
JO - New Journal of Chemistry
JF - New Journal of Chemistry
SN - 1144-0546
IS - 12
ER -