Hemilabile Thioether Ligands Based on Pyrimidine and/or Pyridine Derivatives that Interconvert between
<i>N</i>
,
<i>S</i>
‐ and
<i>N</i>
‐Coordination in Congested Ruthenium(
<scp>II</scp>
) Complexes
作者:Giuseppe Tresoldi、Laura Baradello、Santo Lanza、Paola Cardiano
DOI:10.1002/ejic.200400976
日期:2005.6
(8), L = L3 (9)}. NMR investigations show that these potentially tridentate ligands act as N,S-bidentate species, to form a five-membered RuSCCN(Ru–N) ring, and in certain cases, as N-monodentate species coordinated to the ruthenium through the 2-pyridylmethyl group. The N,S-chelated species contain chiral sulfur and ruthenium atoms with (R) and (S), and Δ and Λ configurations, respectively. Two invertomers
硫醚配体 L [L = 2-吡啶基甲基 2'-吡啶基硫化物 (L1)、2-吡啶基甲基 2'-嘧啶基硫化物 (L2) 和 2-吡啶基甲基 2'-(4-甲基嘧啶基) 硫化物 (L3)] 与顺式反应-[Ru(N,N-二亚胺)2Cl2] 二亚胺 = 2,2'-联吡啶 (bipy), 二-2-嘧啶基硫化物 (dprs), 2,2'-双(5-乙基嘧啶基) 硫化物 (5edprs) }得到化合物[Ru(N,N-二亚胺)2L][PF6]2二亚胺=bipy,L=L1(1),L2(2),L3(3);二亚胺 = dprs, L = L1 (4); 二亚胺 = 5edprs, L = L1 (5); 二亚胺 = dprs,L = L2 (6),L = L3 (7);二亚胺 = 5edprs,L = L2 (8),L = L3 (9)}。核磁共振研究表明,这些潜在的三齿配体作为 N,S-双齿物质,形成五元 RuSCCN(Ru-N)