Synthesis and structural characterization of a gamma-Keggin-type dimeric silicotungstate with a bis(mu-hydroxo) dizirconium core [(gamma-SiW10O36)2Zr2(mu-OH)2]10-.
A novel dinuclear zirconium sandwich-type silicotungstate cluster of [(gamma-SiW(10)O(36))(2)Zr(2)(mu-OH)(2)](10-) (1) was synthesized by the reaction of a divacant lacunary gamma-Keggin silicotungstate [gamma-SiW(10)O(36)](8-) with ZrOCl(2).8H(2)O. The anion consisted of two [gamma-SiW(10)O(36)](8-) units sandwiching a diamond Zr(2)(mu-OH)(2) core, and each zirconium atom in 1 was six-coordinated to two mu-OH ligands and four oxygen atoms of two [gamma-SiW(10)O(36)](8-) units. The Zr(2)(mu-OH)(2) core in 1 reacted with methanol to give the corresponding monomethoxo derivative [(gamma-SiW(10)O(36))(2)Zr(2)(mu-OH)(mu-OCH(3))](10-) (2).
Yamaguchi
Syuhei
S
Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012.
Kikukawa
Yuji
Y
Tsuchida
Kazutaka
K
Nakagawa
Yoshinao
Y
Uehara
Kazuhiro
K
Yamaguchi
Kazuya
K
Mizuno
Noritaka
N