title: Silver(I) complexes with oxazoline-containing tripodal ligands: structure variation via counter anions and reaction conditions.
abstract: Seven new silver(I) complexes of the formula [Ag2(L)2(CF3SO3)2] (1), [Ag2(L)2(CH3SO3)2] (2) [Ag2(L)2](BF4)2 (3), [Ag3(L)2(NO3)2]NO3.5H2O (4), [Ag2(L)(NO3)2].CH3OH (5), [Ag2(L)2](ClO4)2 (6) and [Ag3(L)2(CH3CN)3](ClO4)3 (7) have been synthesized by reactions of 1,3,5-tris(2-oxazolinyl)benzene (L) with varied silver(I) salts under different conditions. The influences of counter anions and reaction conditions on the structure of the complexes are discussed. Three complexes , 1, 2 and 3 with two kinds of different 1D chain structures were obtained under the same synthetic conditions by using different silver(I) salts, and the ligand L was found to adopt bis-monodentate (1 and 2) and tris-monodentate (3) coordination modes respectively. On the other hand, by using the same silver(I) nitrate or silver(I) perchlorate but different reaction solvents, 4 and 5 or 6 and 7 were isolated respectively. Complexes 4and 5 have different 1D chain structures, and 6 is isostructural with . However, 7 is a tri-nuclear, propeller-shaped M3L2 supramolecular capsule in which L adopts a cis,cis,cis-conformation, while the ligand L in 3-6 has cis,trans,trans-conformation. The results revealed that the nature of the counter anions, such as their size, coordination ability and coordination mode, and the reaction conditions all have great impact on the structure of the complexes. The complexes were also characterized by electrospray mass spectrometry. Furthermore, complex 7 exhibited modest second-harmonic-generation (SHG) efficiency.
authors: Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.
authors: Yong-Qing
authors: YQ
authors: Huang
authors: Zhong-Liang
authors: ZL
authors: Shen
authors: Taka-aki
authors: TA
authors: Okamura
authors: Yan
authors: Y
authors: Wang
authors: Xiao-Feng
authors: XF
authors: Wang
authors: Wei-Yin
authors: WY
authors: Sun
authors: Jin-Quan
authors: JQ
authors: Yu
authors: Norikazu
authors: N
authors: Ueyama
mesh_terms: D000838:Anions / Q000737:chemistry; D018360:Crystallography, X-Ray; D008024:Ligands; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis*; D010080:Oxazoles / Q000138:chemical synthesis*; D018030:Silver Compounds / Q000138:chemical synthesis*; D012997:Solvents; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D000838:Anions; D008024:Ligands; D009942:Organometallic Compounds; D010080:Oxazoles; D018030:Silver Compounds; D012997:Solvents