Synthesis, spectral characterization, optical properties and X-ray structural studies of S centrosymmetric N2S2 or N2S2O2 donor Schiff base ligand and its binuclear transition metal complexes
作者:O.A. El-Gammal、D.A. Saad、A.F. Al-Hossainy
DOI:10.1016/j.molstruc.2021.130974
日期:2021.11
and its metal complexes with Co (II), Ni (II), Cu (II), and Zn (II) ions. The isolated complexes were characterized by conventional spectroscopic (IR, UV-visible, ESR, 1H, 13C-NMR, and mass), elemental analysis, and magnetic as well as thermal measurements. H2TTAH binds either as neutral tetra-dentate and mono- or dibasic NNOOSS hexadentate coordinating two metal ions. The metal complexes afforded the
合成了一种新的螯合物,即 2,2'-硫代双(N\-噻吩-2-基亚甲基)乙酰肼) (H 2 TTAH) 及其与 Co (II)、Ni (II)、Cu (II) 和Zn (II) 离子。分离的配合物通过常规光谱(IR、UV-可见光、ESR、1 H、13 C-NMR 和质量)、元素分析、磁以及热测量表征。H 2 TTAH 以中性四齿和单或二元 NNOOSS 六齿配位两种金属离子的形式结合。金属络合物的分子式为:[Cu 2 (TTAH)Cl 3 (C 2 H 5 OH) 3 ]0.5C 2 H 5 OH.H2 O (1) , [Co 2 (TTAH)(C 5 H 5 N)]Cl 2 .2.5C 2 H 5 OH (2) , [Ni 2 (TTAH)(C 5 H 5 N) 2 (OH) 2 (C 2 H 5 OH) 2 ] (3)和 [Zn 2 (TTAH) 2 )(OH) 4 (C 5 H 5 N)
Antitumour imidazotetrazines. Part 39. Synthesis of bis(imidazotetrazine)s with saturated spacer groups
作者:Jill Arrowsmith、Sharon A. Jennings、David A. F. Langnel、Richard T. Wheelhouse、Malcolm F. G. Stevens
DOI:10.1039/b005652i
日期:——
Bis(imidazotetrazine)s (16), related in structure to the antitumour agents mitozolomide (1a) and temozolomide (1b), but linked through the N(3)–N(3′) atoms of the imidazo[5,1-d][1,2,3,5]tetrazine ring-systems, are prepared by interaction of 5-diazoimidazole-4-carboxamide (8) and diisocyanates (15). The presence of the polymethylene linker with/without sulfur and oxygen heteroatoms does not substantially affect the acid stability, base-catalysed decomposition, antitumour activity or DNA base alkylation preference characteristic of the unlinked imidazotetrazines mitozolomide and temozolomide.
Bishydrazone ligand and its Zn-complex: synthesis, characterization and estimation of scalability inhibition mitigation effectiveness for API 5L X70 carbon steel in 3.5% NaCl solutions
作者:Ola. A. El-Gammal、Dina A. Saad、Marwa N. El-Nahass、Kamal Shalabi、Yasser M. Abdallah
DOI:10.1039/d4ra00404c
日期:2024.4.22
Zn-complex: characterization and estimation of scalability inhibition mitigation effectiveness for API 5L X70 carbon steel in 3.5% NaCl solutions.
Notes: Potential Anticancer Compounds. I. Synthesis of Thiodiacetic Acid Hydrazides and Homologs
作者:Hans Zimmer、Edward Shaheen
DOI:10.1021/jo01090a614
日期:1959.8
Chemistry and application of organic isocyanates. X. Synthesis of Aliphatic Diisocyanates containing oxygen or sulphur bridge in polymethylene chain