Stabilization of Calcium− and Terbium−Carboxylate Bonds by NH···O Hydrogen Bonds in a Mononuclear Complex: A Functional Model of the Active Site of Calcium-Binding Proteins
作者:Akira Onoda、Yusuke Yamada、Yoshiki Nakayama、Kazuyuki Takahashi、Hiroshi Adachi、Taka-aki Okamura、Akira Nakamura、Hitoshi Yamamoto、Norikazu Ueyama、Drahomir Vyprachticky、Yoshi Okamoto
DOI:10.1021/ic035075t
日期:2004.7.1
acid ligands with bulky amide groups at the ortho position, 2,6-(MeCONH)(2)C(6)H(3)CO(2)H (1) and 2,6-(t-BuCONH)(2)C(6)H(3)CO(2)H (2), and their tris- and tetrakis(carboxylate) complexes with Ca(II) and Tb(III) ions, (NEt(4))(2)[Ca(II)[O(2)C-2,6-(t-BuCONH)(2)C(6)H(3)](4)] (4), [Tb[O(2)C-2,6-(t-BuNHCO)(2)C(6)H(3)](3)(H(2)O)(3)]] (5), and (NMe)(4)[Tb[O(2)C-2,6-(t-BuNHCO)(2)C(6)H(3)](4)(thf)] (6), were
新型苯甲酸配体在邻位有庞大的酰胺基,2,6-(MeCONH)(2)C(6)H(3)CO(2)H(1)和2,6-(t-BuCONH)( 2)C(6)H(3)CO(2)H(2)及其三和四(羧酸盐)与Ca(II)和Tb(III)离子的配合物,(NEt(4))(2) [Ca(II)[O(2)C-2,6-(t-BuCONH)(2)C(6)H(3)](4)](4),[Tb [O(2)C- 2,6-(t-BuNHCO)(2)C(6)H(3)](3)(H(2)O)(3)]](5)和(NMe)(4)[Tb [合成了O(2)C-2,6-(t-BuNHCO)(2)C(6)H(3)](4)(thf)](6)。2(NEt(4))[2,6-(t-BuCONH)(2)C(6)H(3)CO(2)在酰胺NH和羧酸酯之间形成NH ... O氢键)](3)和4(1)在溶液中和固态(CRAMPS,IR)下通过1 H NMR光谱测定。尝试在4至大量过量的2