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首页> 外文期刊>Crystal growth & design >Versatility of thiosemicarbazones in the construction of monomers, dimers and hydrogen-bonded networks of silver(I) complexes
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Versatility of thiosemicarbazones in the construction of monomers, dimers and hydrogen-bonded networks of silver(I) complexes

机译:硫半脲在银(I)配合物的单体,二聚体和氢键网络中的通用性

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摘要

Reactions of thiosemicarbazones {(RRC2)-R-1-C-2=N-3-N-2(H)-C-1(=S)-(NH2)-H-1], a multidonor class of ligands, with silver(l) halides in the presence of PPh3 have yielded a variety of compounds, viz.: (i) halogen-bridged dimers, [Ag-2(mu-X)(2)(eta(1)'-S-Haptsc)(2)(PPh3)(2)] (R-1 = Ph, R-2 = Me, Haptsc, X = Cl (1); Br (2)), [Ag-2(mu-Br)(2)(eta(1)-S-Hbtsc)(2)(PPh3)(2)] (R-1 = Ph, R-2 = H, Hbtsc (3)), [Ag-2(mu-Br)(2)(eta(1)-S-Hactsc)(2)(PPh3)(2)] (R-1 = R-2 = Me, Hactsc (4)); (ii) sulfur-bridged dimers, [Ag2Br2(mu-S-Hptsc)(2)(PPh3)(2)]center dot 2H(2)O (R-1 = pyrrole, R-2 = H, Hptsc (5)), and [Ag2Cl2(mu-S-Httsc)(2)(PPh3)(2)]center dot 2CH(3)CN (R-1 = thiophene, R-2 = H, Httsc (6)), and (iii) monomers, [AgX(eta(1)-S-Hpytsc)(PPh3)(2)]center dot CH3CN (R-1 = pyridine, R-2 = H, Hpytsc, X Br (7); Cl (8)). In contrast, silver(I) nitrate has formed only sulfur-bridged dimers, [Ag-2(eta(1)-N-mu-S-Hftsc)(2)(Ph3P)(2)](NO3)(2) (9) (R-1 = furan, R-2 = H, Hftsc), and [Ag-2(eta(1)-S-Hptsc)(2)(mu-S-HptsC)(2)(Ph3P)(2)](NO3)(2)center dot 2CHCl(3) (10) (R-1 = pyrrole, R-2 = H, Hptsc) (Hpytsc = pyridine-2-carbaldehyde thiosemicarbazone, Hptsc = pyrrole-2-carbaldehyde thiosemicarbazone, Httsc = thiophene-2-carbaldehyde thiosemicarbazone, Hftsc = furan-2-carbaldehyde thiosemicarbazone, Hbtsc = benzaldehyde thiosemicarbazone, Hactsc = acetone thiosemicarbazone, and Haptsc = acetophenone thiosemicarbazone). Complexes 1-10 are the first examples exhibiting new bonding modes (eta(1)-S,mu-S, and mu-S-eta(1)-N-3) in silver(l)thiosemicarbazone chemistry. The substituents at C-2 carbon appear to have significant influence on the nature of bonding in the complexes. The intermolecular interactions such as, NH center dot center dot center dot X (X = S, Br, Cl, O), CH center dot center dot center dot pi and CH center dot center dot center dot X (X = S, Cl) have led to the formation of one- and two-dimensional (ID and 2D) networks. Interestingly, a novel feature is that some of the 2D networks encapsulate organic molecules in the voids.
机译:硫半脲酮((RRC2)-R-1-C-2 = N-3-N-2(H)-C-1(= S)-(NH2)-H-1]的反应,是一种多供体配体,在PPh3存在下用卤化银(l)生成了多种化合物,即:(i)桥连卤素的二聚体[Ag-2(mu-X)(2)(eta(1)'-S- Haptsc)(2)(PPh3)(2)](R-1 = Ph,R-2 = Me,Haptsc,X = Cl(1); Br(2)),[Ag-2(mu-Br)( 2)(eta(1)-S-Hbtsc)(2)(PPh3)(2)](R-1 = Ph,R-2 = H,Hbtsc(3)),[Ag-2(mu-Br) (2)(eta(1)-S-Hactsc)(2)(PPh3)(2)](R-1 = R-2 = Me,Hactsc(4)); (ii)硫桥二聚体,[Ag2Br2(mu-S-Hptsc)(2)(PPh3)(2)]中心点2H(2)O(R-1 =吡咯,R-2 = H,Hptsc(5 ))和[Ag2Cl2(mu-S-Httsc)(2)(PPh3)(2)]中心点2CH(3)CN(R-1 =噻吩,R-2 = H,Httsc(6)),和(iii)单体[AgX(eta(1)-S-Hpytsc)(PPh3)(2)]中心点CH3CN(R-1 =吡啶,R-2 = H,Hpytsc,X Br(7); Cl( 8))。相反,硝酸银(I)仅形成硫桥联的二聚体,[Ag-2(eta(1)-N-mu-S-Hftsc)(2)(Ph3P)(2)](NO3)(2) (9)(R-1 =呋喃,R-2 = H,Hftsc)和[Ag-2(eta(1)-S-Hptsc)(2)(mu-S-HptsC)(2)(Ph3P) (2)](NO3)(2)中心点2CHCl(3)(10)(R-1 =吡咯,R-2 = H,Hptsc)(Hpytsc =吡啶-2-甲醛二硫代氨基脲,Hptsc =吡咯-2-乙醛硫半脲,Httsc =噻吩-2-甲硫脲配合物1-10是在银(l)硫代半碳zone化学中显示新键合模式(eta(1)-S,mu-S和mu-S-eta(1)-N-3)的第一个示例。 C-2碳上的取代基似乎对络合物中键合的性质具有重要影响。分子间相互作用,例如NH中心点中心点中心点X(X = S,Br,Cl,O),CH中心点中心点中心点pi和CH中心点中心点中心点X(X = S,Cl)导致形成一维和二维(ID和2D)网络。有趣的是,一个新颖的特征是某些2D网络将有机分子封装在空隙中。

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