• Title/Summary/Keyword: Coordination chemistry

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Anion-Dependent Exocyclic Mercury(II) Coordination Polymers of Bis-dithiamacrocycle

  • Siewe, Arlette Deukam;Kim, Seulgi;Choi, Kyu Seong;Lee, Shim Sung
    • Bulletin of the Korean Chemical Society
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    • v.35 no.12
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    • pp.3459-3464
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    • 2014

  • Synthesis and structural characterization of mercury(II) halides and perchlorate complexes (1-4) of bis-$OS_2$-macrocycle (L) are reported. L reacts with mercury(II) chloride and bromide to yield an isostructural 2D coordination polymers with type $[Hg(L)X_2]_n$ (1: X = Cl and 2: X = Br). In 1, each Hg atom which lies outside the cavity is six-coordinate with a distorted octahedral geometry, being bound to four adjacent ligands via monodentate Hg-S bonds and two remaining sites are occupied by two terminal chlorido ligands to form a fishnet-like 2D structure. When reacting with mercury(II) iodide, L afforded a 1D coordination polymer $\{[Hg_2(L)I_4]{\cdot}CHCl_3\}_n$ (3) in which each exocyclic Hg atom is four-coordinate, being bound to two sulfur donors from different ligands doubly bridging the ligand molecules in a head-to-tail mode. The coordination sphere in 3 is completed by two iodo terminal ligands, adopting a distorted tetrahedral geometry. On reacting with mercury(II) perchlorate, L forms solvent-coordinated 1D coordination polymer $\{[Hg_2(L)(DMF)_6](ClO_4)_4{\cdot}2DMF\}_n$ (4) instead of the anion-coordination. In 4, the Hg atom is five-coordinate, being bound to two sulfur donors from two different ligands doubly bridging the ligand molecules in a side-by-side mode to form a ribbon-like 1D structure. The three remaining coordination sites in 4 are completed by three DMF molecules in a monodentate manner. Consequently, the different structures and connectivity patterns for the observed exocyclic coordination polymers depending on the anions used are influenced not only by the coordination ability of the anions but also by anion sizes.

  • https://doi.org/10.5012/bkcs.2014.35.12.3459 인용 PDF KSCI

Structural Diversity of Five New Lanthanide Coordination Polymers Tuned by Different Salt Anions

  • Tao, Yinhua;Lou, Yongbing;Li, Yang;Chen, Jinxi
    • Bulletin of the Korean Chemical Society
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    • v.35 no.5
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    • pp.1417-1421
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    • 2014

  • Five new lanthanide coordination polymers, $[Ln_2(1,4-NDC)_2(1,4-HNDC)_2(phen)_2]_n$ (Ln = Er (1), Yb (2)), and $[Ln_2(1,4-NDC)_3(phen)_2(H_2O)_2]_n$ (Ln = Nd (3), Gd (4), Er (5)) ($1,4-H_2NDC$ = 1,4-naphthalenedicarboxylic acid, phen = 1,10-phenanthroline), have been successfully prepared via the reaction of corresponding trivalent lanthanide salt, $1,4-H_2NDC$ and phen in the presence of NaOH and pyridine under hydrothermal condition. Pyridine plays a key role in the synthesis of these lanthanide coordination polymers. Single-crystal X-ray diffraction analyses indicate that compounds 1-5 all form a 2-D network while different salt anions result in the diversity of crystal structures. These lanthanide coordination polymers showed a considerable thermal stability in TGA analyses.

  • https://doi.org/10.5012/bkcs.2014.35.5.1417 인용 PDF KSCI KPUBS HTML

Synthesis, Crystal Structure and Density Functional Calculations on 1-Phenyl-3-p-fluorophenyl-5-p-chlorophenyl-2-pyrazoline

  • Zhao, Pu Su;Li, Yu Feng;Guo, Huan Mei;Jian, Fang Fang;Wang, Xian
    • Bulletin of the Korean Chemical Society
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    • v.28 no.9
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    • pp.1539-1544
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    • 2007

  • 1-Phenyl-3-p-fluorophenyl-5-p-chlorophenyl-2-pyrazoline has been synthesized and characterized by elemental analysis, IR, UV-Vis and X-ray single crystal diffraction. Density functional calculations show that B3LYP/6-311G** method can reproduce the structural parameters. The electronic absorption spectra have been predicted based on the optimized structure by using 6-311G** and 6-311++G** basis sets and compared with the experimental values. The results indicate that TD-DFT method can only predict the electronic absorption spectra of the system studied here approximately. On the basis of vibrational analyses, the thermodynamic properties of the title compound at different temperatures have been calculated, revealing the correlations between ,C0p,m,S0m,H0m and temperature.

  • https://doi.org/10.5012/bkcs.2007.28.9.1539 인용 PDF KSCI

Reaction and Coordination Chemistry of Ferrocenylaminophosphines with Iron Carbonyls

  • Tae-Jeong Kim;Soon-Chul Kwon;Yong-Hoon Kim;Dong-Ho Lee
    • Bulletin of the Korean Chemical Society
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    • v.12 no.3
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    • pp.332-334
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    • 1991

  • The reaction and coordination chemistry of chiral ferrocenylaminophosphines such as 2-(diphenylphosphino)-1-(N,N-dimethylaminoethyl) ferrocene (PPFA), and 1',2-bis(diphenylphosphino)-l-(N,N-dimethylaminoe thyl) ferrocene (BPPFA), with various iron carbonyls have been investigated. PPFA reacted with iron carbonyls, Fe$(CO)_5$, $Fe_2(CO)_9$, or $Fe_3(CO)_{12}$ to give an iron complex of the type (${\eta}^1$-PPFA-P)Fe$(CO)_4$ (1) as a single product regardless the choice of the iron carbonyls. The bisphosphine ligand BPPFA afforded two products (${\eta}^1$-BPPFA-P)Fe$(CO)_4$ (2) and (${\mu}$,${\eta}^1$-BPPFA-P,P)$Fe_2(CO)_8$ (3) in which BPPFA acts as a monodentate and a bridging ligand, respectively. In all cases coordination to the -Fe$(CO)_4$ moiety is made through the phosphine rather than the amino group and, in the case of 2, the coordination is made through the phosphine substituted at the $C_5H_4$ ring to reduce the steric congestion.

  • https://doi.org/10.5012/bkcs.1991.12.3.332 인용 PDF