Identification of a Discrete Peroxide Dianion, O<sub>2</sub><sup>2−</sup>, in a Two Sodium–(1,6-Anhydro-β-maltose)<sub>2</sub>–Peroxide Complex
作者:Takayuki Kato、Takashi Fujimoto、Ayumi Tsutsui、Mitsuru Tashiro、Yoshihiro Mitsutsuka、Tomoya Machinami
DOI:10.1246/cl.2010.136
日期:2010.2.5
A complex formed by two 1,6-anhydro-β-maltoses with peroxide and two sodium ions has been isolated and determined to be [Na2(1,6-anhydro-β-maltose)2(H2O)3]O2 by X-ray crystallography. The O2 moiety, 1.496(2) Å for the O–O distances in the complex was identified as a discrete peroxide dianion, whereas two sodium and two carbohydrate molecules constitute a binuclear complex counter cation.The complex containing the discrete peroxide dianion was proven to be a useful oxidizing agent, which successfully oxidized α,β-unsaturated ketone to epoxyketone.
一个由两个1,6-脱水β-麦芽糖、过氧化物和两个钠离子形成的复合物被分离出来,并通过X射线晶体学确定为[Na2(1,6-脱水-β-麦芽糖)2(H2O)3]O2。复合物中O2的部分,O–O距离为1.496(2) Å,被识别为一个离散的过氧化氢二阴离子,而两个钠离子和两个碳水化合物分子构成了一个双核复合物的阳离子。含有离散过氧化氢二阴离子的复合物被证明是一种有效的氧化剂,它成功地将α,β-不饱和酮氧化为环氧酮。