期刊
ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY
卷 77, 期 -, 页码 522-+出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S2053229621008160
关键词
potassium siloxide; crystal structure; alkali metal siloxide; triphenylsilanol; triphenylsiloxide; reverse micelles; alkali metal polyoxometalate; POM
资金
- Narodowe Centrum Nauki [2016/23/B/ST5/01480]
The structures of two new potassium triphenyl-siloxides resemble alkali metal polyoxometalates and have a reverse micelle-like architecture, with hydrogen bonds present. Intramolecular pi-interactions between hydrophobic aromatic rings derived from Ph3SiO- anions and potassium cations stabilize the cores of the crystals.
The synthesis and structural characterization of two new potassium triphenyl-siloxides, namely, aqua(propan-2-ol)hexakis(triphenylsilanolato)hexapotassium toluene disolvate, [K-6(C18H15OSi)(6)(C3H8O)(H2O)]center dot 2C(7)H(8), and diaquahexakis-(triphenylsilanolato)hexapotassium, [K-6(C18H15OSi)(6)(H2O)(2)], are reported. Both compounds crystallize in the triclinic space group P (1) over bar. The structure in each case resembles an alkali metal polyoxometalate-like structure, in which electrostatic interactions are observed in the metal-oxygen core. Furthermore, both compounds also resemble a reverse micelles-like architecture, in which the hydrophilic core is enclosed in a hydrophobic shell. The cores of the complexes are flanked by hydrophobic aromatic rings derived from Ph3SiO- anions, where intramolecular pi-interactions between the aromatic rings and potassium cations stabilize the cores of the crystals. Moreover, in both structures, the presence of hydrogen bonds is observed; until now, no crystal structures have been described containing K atoms and triphenylsiloxide molecules in which the presence of hydrogen bonds was confirmed. Thus, these coordination entities could be considered as attractive reagents for further synthetic protocols towards heterometallic complexes.
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