Effect of the Additional Carboxyl Group in Half-Sandwich Organometallic 2,4-Dipicolinate Complexes on Solution Speciation and Structure

被引：4
作者：
Meszaros, Janos P. [1 ,2 ]
Nemeti, Gabor [1 ]
Poljarevic, Jelena M. [1 ,3 ]
Holczbauer, Tamas [4 ,5 ]
May, Nora V. [4 ]
Enyedy, Eva A. [1 ,2 ]
机构：
[1] Univ Szeged, Interdisciplinary Excellence Ctr, Dept Inorgan & Analyt Chem, Dom Ter 7, H-6720 Szeged, Hungary
[2] Univ Szeged, MTA SZTE Lendulet Funct Met Complexes Res Grp, Dom Ter 7, H-6720 Szeged, Hungary
[3] Univ Belgrade, Fac Chem, Studentski Trg 12-16, Belgrade 11000, Serbia
[4] Res Ctr Nat Sci, Ctr Struct Sci, Magyar Tudosok Korutja 2, H-1117 Budapest, Hungary
[5] Inst Organ Chem, Res Ctr Nat Sci, Magyar Tudosok Korutja 2, H-1117 Budapest, Hungary
来源：
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2021年 / 2021卷 / 19期
关键词：
Solution stability; X-ray crystal structures; Trinuclear complex; 2-picolinic acid; Halide affinity; COMPARATIVE SOLUTION EQUILIBRIUM; RUTHENIUM(II) ARENE COMPLEXES; CHEMISTRY; ACID;
D O I：
10.1002/ejic.202100122
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Solution speciation of Rh(eta(5)-C5Me5), Ru(eta(6)-p-cymene) and Ru(eta(6)-toluene) complexes of 2,4-pyridinedicarboxylic acid (2,4-dipicH(2)) was studied and compared to that of 2-picolinic acid (picH) in addition to their reactivity towards chloride and bromide ions, 1-methylimidazole and guanosine. Structures of [Rh(eta(5)-C5Me5)(2,4-dipicH)Cl] 3H(2)O (1), 2[Ru(eta(6)-toluene)(2,4-dipicH)Cl] 3H(2)O (2) and [Ru(eta(6)-toluene)(2,4-dipic)](3) 7H(2)O (3) were analyzed by X-ray diffraction. 1 and 2 show typical piano stool geometry, while 3 is a triangular complex stabilized via the monodentate coordination of the second carboxylate group to the neighboring Ru(II) center. High stability [M(arene)L(H2O/Cl)] species predominate at pH 7.4. 2,4-Dipic forms more stable complexes with Ru(eta(6)-arene) than pic, with this difference being minor in the case of the Rh(eta(5)-C5Me5) complexes. A lower affinity of 2,4-dipic complexes to halide ions was found compared to the corresponding pic complexes due to the additional COO- moiety.
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收藏
页码：1858 / 1868
页数：11
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