Synthesis and characterization of green-to-yellow emissive Ir(III) complexes of pyridylbenzothiadiazine ligand
作者:Amlan K. Pal、David B. Cordes、Konstantina Pringouri、Muhammad U. Anwar、Alexandra M. Z. Slawin、Jeremy M. Rawson、Eli Zysman-Colman
DOI:10.1080/00958972.2016.1170818
日期:2016.7.2
ancillary ligands in both 1 and 2 bind to the iridium via coordination of N2 of the benzo[e][1,2,4]thiadiazine. Upon isolation of the neutral complex, the sulfur rapidly oxidizes to form 2. The UV–vis absorption spectra of the complexes exhibit both ligand-centered and mixed metal-to-ligand and ligand-to-ligand charge transfer transitions that are typical of many heteroleptic iridium complexes. Complexes
Copper-promoted aerial oxidation of benzothiadiazines: access to benzothiadiazine S-oxide heterocycles
作者:Ewan R. Clark、John J. Hayward、Bryce J. Leontowicz、Muhammad U. Anwar、Melanie Pilkington、Jeremy M. Rawson
DOI:10.1039/c4dt03467h
日期:——
Aerial oxidation of benzothiadiazines selectively affords the corresponding benzothiadiazine S-oxides in the presence of Cu2+ ions. Structural studies reveal that the S-oxide appears to be a strong hydrogen-bond acceptor.
Syntheses of, and structural studies on, benzo-fused 1,2,4-thiadiazines
作者:Ewan R. Clark、John J. Hayward、Bryce J. Leontowicz、Dana J. Eisler、Jeremy M. Rawson
DOI:10.1039/c3ce42205d
日期:——
The syntheses of nine benzo-fused-1,2,4-thiadizines are reported. The use of microwave synthesis has been shown to afford high yields and short reaction times in several key reaction steps. The molecular geometries of these heterocycles are discussed and their solid state packing motifs reveal a strong tendency for the N–H group to form hydrogen bonded chains.
Synthesis and characterisation of first row transition metal complexes of functionalized 1,2,4-benzothiadiazines
作者:Ewan R. Clark、Muhammad U. Anwar、Bryce J. Leontowicz、Yassine Beldjoudi、John J. Hayward、Wesley T. K. Chan、Emma L. Gavey、Melanie Pilkington、Eli Zysman-Colman、Jeremy M. Rawson
DOI:10.1039/c4dt01413h
日期:——
Reaction of the novel ligand 3-(2′-pyridyl)-benzo-1,2,4-thiadiazine (L) with the transition metal chloride salts MCl2·xH2O (MII = Mn, Fe, Co, Cu and Zn) in a 2 : 1 mole ratio afforded the mononuclear octahedral (high spin) complexes L2MCl2 (1a–1e respectively) in which L binds in a chelate fashion via N(2) and the pyridyl N atoms. In the case of CuCl2 the intermediate 1 : 1four-coordinate complex
新型配体3-(2'-吡啶基)-苯并-1,2,4-噻二嗪(L)与过渡金属氯化物盐MCl 2 · x H 2 O(M II = Mn,Fe,Co,Cu和锌)以2:1的摩尔比提供单核八面体(高自旋)配合物L 2 MCl 2(分别为1a-1e),其中L通过N(2)和吡啶基N原子以螯合方式结合。在CuCl 2的情况下,还分离出了中间体1:1四配位配合物LCuCl 2(2),该结构采用了具有连接伪正方形平面分子的聚合物结构通过在顶端位置的长Cu⋯S触点(d Cu⋯S = 2.938(1)Å)。在非相互作用离子的存在下,分离出3:1的络合物,例如L与Fe(CF 3 SO 3)2以3:1的比例反应,从而提供了低自旋络合物[L 3 Fe] [CF 3 SO 3 ] 2(3)。在有氧条件下,L与VCl 3以2:1的摩尔比反应,得到钒基络合物[L 2 V(O)Cl] [Cl](4)。