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The X-ray Crystal Structure of 3, 3' ; 5', 3"-Bis(tetramethylene)-2, 2' ; 6' 2"-terpyridine
Jahng, Yurngdong 영남대학교 자원문제연구소 1994 資源問題硏究 Vol.13 No.-
To help better understand the conformational as well as structural features. a single crystal X-ray analysis of 3,3'; 5',3"-bis(tetrHmethylene)-2,2': 6',2"-terpyridine was undertaken to show this molecule retains Cn symmetry and exists in the monoclinic space group. P2lf.. with four molecules per unit cell, and a = 9.036(4) A, b = 16.741(8) A. c = 12.217(6) A, and☞ = 107.09(3) " as cell constants.
Synthesis and Biological Activity of Conformationally Controlled 2-PAM Derivatives
Jahng, Yurngdong,Park, Jae Gyu,Yu, Jung Whey,Kim, Sun Young,Kim, Taean,Yang, Jae Ho 영남대학교 약품개발연구소 2000 영남대학교 약품개발연구소 연구업적집 Vol.10 No.-
A series of conformationally controlled 2-PAM derivatives were prepared from 2-acetylpyridine and 2,3-pyrido[b]cycloalkenones in two steps and their reactivities towards parathion poisoned AChE were evaluated. The most planar 2,3-pyrido[b]cyclohexanone oxime methiodide showed an activity comparable to 2-PAM implying E-syn is that the most active comformation of 2-PAM in the biological system.
Formation of Ruthenium(Ⅱ) Complexes with Unsymmetrical Terdentate Ligands
Jahng, Yurngdong,Thummel, Randolph P.,Bott, Simon G. 영남대학교 약품개발연구소 1997 영남대학교 약품개발연구소 연구업적집 Vol.7 No.-
Three unsymmetrical terdentate ligands, 2-(2'-quinolyl)-1.10-phenanthroline (4), 2-(1'-isquinolyl)-1.10-phenanthroline (5), and 3.3'-dimethylene-2-(2'-quinolyl)-1.10-phenanthroline (6), have been prepared by application of the Friedlander condensation. Ligand 4 forms predominantly a pentaaza-coordinated (N5) complex with Ru(Ⅱ), [Ru(4-N,N,N')(4-N,N)Cl](PF_(6), whose structure was determined by X-ray analysis (C₄₂H_(26)CIF_(6)N_(6)PRu: monoclinic, C2lc, a=29.308(3) A, b=15.295(2) A, c=19.505(2) A, β=107.312(8)˚, V=8298(Ⅰ) A³, Z=8). Ligand 5 forms predominantly a hexaaza-coordinated (N6) complex, [Ru(5-N,N,N')₂. The bridged species 6 shows intermediate behavior, and the rate for interconversion of the N5 to N6 complex has been measured. The stereochemical features of these two binding modes are examined, and both π-stacking and steric effects are invoked to explain the observed behavior, leading to the proposal of a backside displacement mechanism for their interconversion.
Synthesis and Biological Properties of Unsymmetrical N,N,N-Terdentates and Their Ru(Ⅲ) Complexes
Jahng, Yurngdong,Park, Jae Gyu,Kim, Hyun Hee 영남대학교 약품개발연구소 1998 영남대학교 약품개발연구소 연구업적집 Vol.8 No.-
Three unsymmetrical terdentates were converted to mono ruthenated complexes, Ru(L-N, N', N")Cl₃, where L. is 2-(2'-pyridyl)-1, 10-phenanthroline, 2-(2'-quinolyl)-1, 10-phenanthroline and 2-(2'-benzo[g]quinolyl)-1, 10-phenanthroline, and their in vitro cytotoxicities were tested.