title: 3D Extended Supramolecular Structures via H-Bonded Linkages of 2D Sheetlike or 1D Zigzag Coordination Polymers.
abstract: Two 3D supramolecular complexes [Cu(2)(trans-oxpn)(phth)](n)().2nH(2)O, 1, and [Cu(2)(trans-oxpn)(&mgr;-OH)(&mgr;-H(2)O)](n)()Br(n)().2nH(2)O, 2 [H(2)oxpn = N,N'-bis(3-aminopropyl)oxamide, phth = phthalate], were synthesized and characterized by single-crystal X-ray crystallography, thermal analyses, and magnetic measurements. 1 crystallizes in the monoclinic space group P2(1)/c with a = 8.578(2) Å, b = 15.596(2) Å, c = 15.657(2) Å, beta = 101.29(2) degrees, Z = 4; 2 crystallizes in the trigonal space group R&thremacr;c with a = 15.266(2) Å, b = 15.266(2) Å, c = 34.953(5) Å, and Z= 18. The neutral 2D sheetlike coordination polymer [Cu(2)(trans-oxpn)(phth)](n)() in 1 contains alternate trans-oxamidate and phthalate bridges and then is joined together by H(2)O molecules via the hydrogen bond linkage Cu(oxpn).H(2)O.H(2)O.(oxpn)Cu to produce a 3D supramolecular structure. The cationic chains [Cu(2)(trans-oxpn)(&mgr;-OH)(&mgr;-H(2)O)](n)()(n)()(+) in 2 contain alternate trans-oxamidate, &mgr;-OH, and &mgr;-H(2)O bridges and are arranged in three directions, intersecting with one another to yield an extended network via the interchain hydrogen bonds formed by metal-coordinated OH(-) with the linkages Cu(oxpn)-OH.OH-Cu(oxpn). Magnetic calculations showed the presence of antiferromagnetic exchange interactions for both complexes. The 2D magnetic coupling system of 1 was simplified into interacting dimers Cu(trans-oxpn)Cu, with the coupling via phth as an interdimer interaction and the data were interpreted with a modified Bleaney-Bowers equation leading to J = -456.7 cm(-)(1) and theta = 22.0 K. 2 was analyzed qualitatively by an alternating chain model taking into account the interchain interaction in a molecular model with J(1) = -309.6 cm(-)(1), J(2) = -63.5 cm(-)(1), and theta = -12.9 K, where J(1) and J(2) denote the coupling constants of the bridges oxamidate and &mgr;-OH, respectively.
authors.affiliation: School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou, Guangdong 510275, China, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, Jiangsu 210093, China.
authors.forename: Zhong-Ning
authors.initials: ZN
authors.lastname: Chen
authors.forename: Hua-Xin
authors.initials: HX
authors.lastname: Zhang
authors.forename: Kai-Bei
authors.initials: KB
authors.lastname: Yu
authors.forename: Bei-Sheng
authors.initials: BS
authors.lastname: Kang
authors.forename: Hu
authors.initials: H
authors.lastname: Cai
authors.forename: Cheng-Yong
authors.initials: CY
authors.lastname: Su
authors.forename: Tian-Wei
authors.initials: TW
authors.lastname: Wang
authors.forename: Zhong-Lin
authors.initials: ZL
authors.lastname: Lu