Self-assembly of polymer and sheet structures from palladium(II) complexes by hydrogen bonding between carboxamide substituents.
Self-assembly of polymer and sheet structures from palladium(II) complexes by hydrogen bonding between carboxamide substituents.
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通过羧酰胺取代基之间的氢键自组装钯（II）络合物的聚合物和片状结构。
DOI：
10.1021/ic0106625
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发表时间：
2001
影响因子：
4.6
通讯作者：
R. Puddephatt
中科院分区：
文献类型：
--
作者：
Zengquan Qin;M. Jennings;R. Puddephatt
研究了吡啶配体上含有伯或仲酰胺基取代基的中性或阳离子钯（II）配合物的超分子结构自组装。用L = N-甲基烟酰胺（MNA）、异烟酰胺（INA）或烟酰胺（NA）分别取代反式[PdCl（2）（PhCN）（2）]中的PhCN，得到相应的配合物trans-[PdCl（2）L（2）] 1-3。配合物1.H（2）O通过酰胺-酰胺氢键形成二维网状结构，并通过氯配体-水氢键相互作用支撑。以PPh 3、dppp、dppm或bu（2）bipy为辅助配体，合成了[Pd（L 'L'）L（2）]（2+）4-9和11-16等配合物。配合物4（L = MNA，L 'L' = dppp）通过酰胺-酰胺氢键形成二聚体，形成大环，大环进一步通过弱C-H链增长形成链状结构。O=C氢键。配合物6（L = NA，L ′ L ′ = dppp）形成由酰胺头对头氢键连接的锯齿形链。配合物8（L = INA，L 'L' = dppm）通过两种类型的酰胺-酰胺氢键相互作用产生有趣的双链条带。配合物13（L' = PPh（3），L = NA）通过互补的酰胺-酰胺氢键形成无限长链。配合物14（L = MNA，L 'L' = bu（2）bipy）通过BF（4）阴离子介导的酰胺氢键与弱的C-H键结合形成无限长的带状结构. O=C氢键。配合物15（L = INA，L ′ L ′ = bu（2）bipy）通过酰胺-酰胺氢键形成梯形聚合物。还报道了cis-[Pd（PPh（3））（2）（OH（2））（2）]（OTf）（2）（10）的结构。
The self-assembly of supramolecular structures from either neutral or cationic palladium(II) complexes containing primary or secondary carboxamide groups as substituents on pyridine ligands has been explored. The displacement of PhCN in trans-[PdCl(2)(PhCN)(2)] by L = N-methylnicotinamide (MNA), isonicotinamide (INA), or nicotinamide (NA) gave the corresponding complexes trans-[PdCl(2)L(2)] 1-3, respectively. Complex 1.H(2)O forms a 2D sheet network via amide-amide hydrogen bonding supported by chloride ligand-to-water hydrogen-bonding interactions. Several cationic complexes, [Pd(L'L')L(2)](2+) 4-9 and 11-16, containing the above ligands and with PPh(3), dppp, dppm, or bu(2)bipy as ancillary ligand(s) were prepared. Complex 4 (L = MNA, L'L' = dppp) forms dimers through amide-amide hydrogen bonding, forming macrocycles which further propagate to form chains via weak C-H...O=C hydrogen bonding. Complex 6 (L = NA, L'L' = dppp) forms zigzag chains connected by amide head-to-head hydrogen bonds. Complex 8 (L = INA, L'L' = dppm) gives interesting double-stranded ribbons linked by two types of amide--amide hydrogen-bonding interactions. Complex 13 (L' = PPh(3), L = NA) forms an infinite chain via complementary amide-amide hydrogen bonds. Complex 14 (L = MNA, L'L' = bu(2)bipy) forms infinite ribbons via the combination of amide hydrogen bonding mediated by a BF(4) anion and weak C-H...O=C hydrogen bonding. Complex 15 (L = INA, L'L' = bu(2)bipy) gives a ladder polymer formed through amide--amide hydrogen bonds. The structure of cis-[Pd(PPh(3))(2)(OH(2))(2)] (OTf)(2) (10) is also reported.