• 제목/요약/키워드: Pd complexes

검색결과 109건 처리시간 0.025초

Synthesis of Some Palladium (II) Complexes of 1, 2-Diaminocyclohexane and Dicarboxylates as Cisplatin Analogues of Palladium Series

  • Kim, Jong-Yoon
    • Archives of Pharmacal Research
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    • 제15권4호
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    • pp.336-342
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    • 1992
  • Ten [$Pd^{II}$(dicarboxylato)(1, 2-diaminocyclohexane)] complexes were prepared after the antitumor-active Pt(II)1, 2-diaminocyclohexane complexes as the cisplatin analogues of palladium series. They were characterized by means of elemental analysis, IR and NMR spectroscopy. As a result, the dicarboxylate ligands were conformed to be chelated with Pd(II) within the scope studied. The stability differences beween the dicarboxylato complexes according to the chelate ring size could not be differentiated due to generally lower thermodynamic stability of the dicarboxylato Pd(II) complexes.

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Geometrical Characteristics and Atomic Charge Variations of Pd(II) Complexes [Pd(L)Cl2] with an Axial (Pd·O) Interaction

  • Park, Jong-Keun;Cho, Yong-Guk;Lee, Shim-Sung;Kim, Bong-Gon
    • Bulletin of the Korean Chemical Society
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    • 제25권1호
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    • pp.85-89
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    • 2004
  • Geometrical structures of [Pd(L)$Cl_2$] with oxathia macrocycles have been calculated using ab initio secondorder Moller-Plesset (MP2) and Density Functional Theory (DFT) methods with triple zeta plus polarization (TZP) basis set level. In optimized Pd(L)$Cl_2$ complexes, Pd(II) locates at the center surrounded by a square planar array of two sulfurs on an oxathia macrocycle and two chlorides. The endo-Pd(II) complexes with an axial (Pd${\cdots}$O) interaction are more stable than the exo-Pd(II) complexes without the interaction. In the endo-Pd(II) complexes, the atomic charge of the oxygen atom moves to Pd(II) via the axial ($Pd{\cdots}$O) interaction and then, the charge transfer from Pd(II) to the S-atoms occurs stepwise via ${\pi}$-acceptors of the empty d-orbitals.

아데닌, 우라실, 시토신 및 말로네이트 배위자를 가진 팔라듐(II) 착물의 합성과 그 성질 (Synthesis and Characterization of Pd(II) Complexes with Adenine, Uracil, Cytosine and Malonate Ligands)

  • 오상오;모성종
    • 대한화학회지
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    • 제30권3호
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    • pp.320-326
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    • 1986
  • 몇몇 백금(II) 착물과 팔라듐(II) 착물에 잠재적인 항종양 활성이 있다고 보고 되었다. 그러나 백금(II) 착물들은 항종양제로서 독성이 있으므로 본 연구에서는 아데닌, 우라실, 시토신 및 말로네이트 배위자를 포함한 팔라듐(II) 착물에 관심을 가지고 합성하였다. 팔라듐(II)와 배위자와의 반응은 수용액 상태에서 연구하였으며, $[Pd(en)(C_5H_5N_5)_2](NO_3)_2,\;[Pd(en)(C_4H_3N_2O_2)Cl],\;[Pd(en)(C_4H_5N_3O)_2](NO_3)_2{\cdot}(C_4H_5N_3O)$$[Pd(en)(C_3H_2O_4)]$ 분자식의 형태로 분리하였다. 이들 화합물들은 원소분석 및 질량분석 및 질량분석으로부터 존재 원소의 함량과 분자식을 추정하였으며, 적외선 스펙트럼과 전자 스펙트럼으로부터 금속과 배위자의 결합 및 전자이동에 대해서 조사하였다.

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Catalytic Activities of Pd(II), Pd(I) and Pd(O)-diphosphine Complexes for Styrene Oxidation

  • 조영제;김경채;정종화;박유철;도명기
    • Bulletin of the Korean Chemical Society
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    • 제16권3호
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    • pp.211-214
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    • 1995
  • The catalytic activities of palladium(0,Ⅰ,Ⅱ)-diphosphine complexes were investigated in styrene oxidation using H2O2 as terminal oxidant. The rates showed a dependence on the chelate ring patterns of complexes (PdCl2L); 5-membered ring (L=dppe: 1,2-bis(diphenylphosphino)ethane) < 6-membered ring (L=dppp: 1,3-bis(diphenylphosphino)propane) < 4-membered ring (L= dppm: bis(diphenylphosphino)methane). This sequence correlates with the ligand field strength and interactions between metal and phosphine ligands. Pd(Ⅱ,Ⅰ)-diphosphine complexes which are capable of making 4-membered chelate ring showed an enhancement of catalytic activities for styrene oxidation. The catalytic activities of Pd(0,Ⅰ,Ⅱ)-diphosphine complexes are described in terms of electronic and steric factors.

Novel and Efficient Palladium Complexes with β-Ketoiminate Ligands for the Polymerization of Norbornene

  • Lee, Dong-Hwan;Hwang, Yoon-Joo;Yoon, Jin-San;Choi, Moon-Kun;Lee, Ik-Mo
    • Bulletin of the Korean Chemical Society
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    • 제30권3호
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    • pp.636-646
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    • 2009
  • A series of the noble palladium complexes containing $\beta$-ketoiminate ligands with internal bases, [Pd(${\eta}^3$-allyl)($\beta$- ketoiminate)], [Pd(Me)($PPh_3$)($\beta$-ketoiminate)] and [Pd(Me)($\beta$-ketoiminate)], have been successfully prepared. Crystallographically determined structures showed that these complexes are distorted square planar and pendant bases of the $\beta$-ketoiminate ligands fail to coordinate to the metal in the first two classes of complexes while bases do coordinate in the 3rd class complexes. These complexes are active towards norbornene polymerization on activation with $H(OEt_2)_2BAr^'_4$ (Ar' = 3,5-bistrifluoromethylphenyl) and modified methylalumioxane (MMAO). MMAO is more efficient for the activation for polymerization. Generally, the polymerization activity increases with the following order; [Pd(allyl)($\beta$-ketoiminate)] < [Pd(Me)($PPh_3$)($\beta$-ketoiminate)] < [Pd(Me)($\beta$-ketoiminate)].

Geometrical Characteristics and Reactivities of Tetracoordinated Pd Complexes: Mono- and Bidentate Ligands and Charged and Uncharged Ligands

  • Yoo, Jin-Seon;Ha, Dong-Su;Kim, Jae-Sang;Kim, Bong-Gon;Park, Jong-Keun
    • Bulletin of the Korean Chemical Society
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    • 제29권3호
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    • pp.627-640
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    • 2008
  • The geometrical structures, atomic charges, and relative energies of tetracoordinated Pd complexes [PdCl3Z (Z = Cl-, Br-, OH?-, H2O, NH3, PH3), PdCl2Z2 (Z = Br-, OH?-, H2O, NH3, PH3), PdZ?2X (Z = Cl-, OH?-, H2O, NH3, PH3; X = oxalate, O2-?CCO2-), and PdZ2Y (Z = Cl?-, OH?-, H2O, NH3, PH3; Y = succinate, CO2-?CHCHCO2-?)] and the ligand exchange reactions of the Pd complexes were investigated using the ab initio second order Mller-Plesset perturbation (MP2) and Density Functional Theory (DFT) methods. The geometrical characteristics of the tetracoordinated Pd(II) complexes with mono- and bidentate ligands, the effects of the atomic charges for the charged and uncharged ligands, the (dz2-p ) interactions between the dz2-orbital of Pd(II) and the p -orbital of bidentates, and the relative stabilities between the isomers of PdCl2Z2 and PdZ2Y were investigated in detail. The potential energy surfaces for the ligand exchange reactions used for the conversions of {[PdCl2(NH3)2] + H2O} to {[PdCl(NH3)2(H2O)]+ + Cl?-?} and {[PdCl2(PH3)2] + H2O} to {[PdCl(PH3)2(H2O)]+ + Cl?-?]} were investigated. The geometrical structure variations, molecular orbital variations (HOMO and LUMO), and relative stabilities for the ligand exchange processes were also examined quantitatively.

Ambidentate 리간드의 금속착물 (제 8 보). Isonitrosomethylacetoacetate Imine 리간드의 니켈(II) 및 팔라듐(II) 착물 (Metal Complexes of Ambidentate Ligand (VIII). Ni (II) and Pd (II) Complexes of Isonitrosomethylacetoacetate Imines)

  • 구본창;최강열;이만호;김인환
    • 대한화학회지
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    • 제37권7호
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    • pp.662-671
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    • 1993
  • isonitrosomethylacetoacetate(H-IMAA)의 이민유도체를 리간드로하는 새로운 Ni(II) 및 Pd(II)착물, Ni(IMAA-NH)(IMAA-NH'), Ni(IMAA-NH)(IMAA-NR),$ Pd(IMAA-NH)_2$, 및 $Pd(IMAA-NR)_2(R=CH_3,\;n-C_3H_7,\;n-C_4H_9$, 또는 $CH_2C_6H_5)$을 합성하고, 이들 착물의 구조를 원소분석, 전자흡수분광법, 적외선흡수분광법, $^1H$$^{13}C$ 핵자기공명분광법으로 조사하였다. 여기서 H-IMAA-MH 및 H-IMAA-NR은 각각 isonitrosomethylacetoacetate imine 및 N-alkylisonitrosomethylacetoacetate imine 유도체를 나타낸다.

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이소옥사졸과 그의 유도체들이 배위된 팔라듐(Ⅱ)과 백금(Ⅱ) 착물의 항암활성에 관한 이론적 연구 (Theoretical Study on Antitumor Activity of Palladium(II) and Platinum(II) Complexes with Isoxazole and Its Derivatives)

  • 김정성;송영대
    • 대한화학회지
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    • 제42권4호
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    • pp.369-377
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    • 1998
  • 이소옥사졸과 그의 유도체가 배위된 팔라듐(II) 및 백금(II)착물$([M(L)_2X_2]$, M=Pd(II), Pt(II); L=isoxazole(isox), 3,5-dimethylisoxazole(3,5-diMeisox), 3-methyl, 5-phenylisoxazole(3-Me, 5-Phisox), and 4-am-ino 3,5-dimethylisoxazole(4-ADI); X=Cl, Br)의 항암활성을 분자역학(MM2)법으로 최소에너지를 갖는 구조를 구한 후 확장분자궤도함수(EHMO)법으로 조사하였다. 중심금속의 $d_x^{2-}_y^2$ 궤도함수와 할로겐 원자의 $p_x$ 궤도함수 사이의 ${\sigma}MO$ 에너지준위$(E_{{\sigma}(Pd,Pt-X)})$가 질소원자의 $p_x$ 궤도함수 사이의 ${\sigma}MO$ 에너지준위 $(E_{\sigma}(Pd,Pt-N))$보다 예외없이 더 높아서 결합이 약함을 알 수 있었다. 아울러 같은 착물에서 cis- 보다 trans-착물에서 $(E_{\sigma}(Pd,Pt-X))$ 값이 더 높아서 결합이 약함을 알았다. 또한 평면형 리간드가 배위될 경우 cis-, trans- 이성체 모두 백금착물에서보다 팔라듐착물에서 $X^-$ 이온의 이탈이 더 용이했다. 다라서 $X^-$ 이온으로 떨어져 나가는 용이성이 항암활성과 어떤 관계가 있을 것으로 생각하고 $E_{{\sigma}(Pd,Pt-N)}-E_{{\sigma}(Pd,Pt-X)}({\Delta}E_{{\sigma}(N-X)})$과 저해활성 계수인 logIA의 값를 도시하였던바 실험치와 상관 계수가 0.96인 좋은 직선성이 성립함을 알 수 있었다.

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아미노포스핀류를 포함하는 팔라듐 (II) 착물 (제1보). $[Pd(L)X_2] (X = Cl^-, Br^-, I^-, NCS^-)$의 합성과 성질 (Palladium(II) Complexes of Aminophosphines (I). Characterization and Synthesis of $[Pd(L)X_2] with X = Cl^-, Br^-, I^-, NCS^-$)

  • 도명기;김봉곤
    • 대한화학회지
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    • 제27권4호
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    • pp.255-261
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    • 1983
  • ${\pi}$-전자받게로서 phsphrous 원자를 가지고 있는 aminophosphines류, trans-1,2-bis[diphenylphosphino)amino]cyclohexane and 1,2-bis[(diphenylphosphino) amino] propane을 포함하는 새로운 팔라듐(II) 착물, $[Pd(L)X_2] (X=Cl^-, Br^-, I^-, NCS^- )$을 합성하고, aminophosphine류와 한자리 리간드를 갖는 Pd(II) 착물의 결합특성을 IR, UV 등으로 조사하였다. 7원 킬레이트 고리를 형성하는 aminophosphines 류 중에 있는 phosphorus 원자의 전자효과 및 입체효과에 따라 두자리성 리간드인 thiocyanate는 Pd-NCS로 배위되며, 한자리 리간드에 따른 분광화학 계열은 $NCS^- > Cl^- > Br^- > I^-$순으로 나타났다.

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몇가지 $d^8$ 전이금속-디포스핀 착물 ($MCl_2PP$)의 합성과 촉매적 응용 (M = $Ni^{2+}$, $Pd^{2+}$, $Pt^{2+}$, $Au^{3+}$ ; PP = diphosphines) (Synthesis Catalytic Application of Several$d^8Transition Metal Diphosphine Complexes, (MCl_2PP) (M = Ni^{2+}, Pd^{2+}, Pt^{2+}, Au^{3+} ; PP = diphosphines)$)

  • 박유철;김경채;조영제
    • 대한화학회지
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    • 제36권5호
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    • pp.685-691
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    • 1992
  • 디포스핀을 포함한 몇가지 $d^8$ 전이금속착물$(MCl_2PP)$은 출발물질 $K_nMCl_m$을 사용하여 합성하였다. 중심금속(M)은 Ni(II), Pd(II), Pt(II), Au(III)이며, 디포스핀(PP)은 bis(diphenylphosphino)methane(dppm), bis(diphenylphosphino)ethane(dppe), bis(diphenylphosphino)propane (dppp) 및 bis(diphenylphosphino)ethylene(dppety)이었다. 착물의 조성이나 특성은 원소분석과 $^1H-NMR$, $^{31}P-NMR$ 및 UV-Visible 스펙트럼을 이용하여 확인하였다. 이들 착물의 촉매적 활성은 3(2H)-furanone 및 cyclic carbonate 생성반응에 대하여 각각 조사하였다. 2-methyl-3-butyn-2-ol로부터 생성물 3(2H)-furanone을 얻은 반응 (1)에서 Ni(II)-, Pd(II)-diphosphine 착물은 좋은 촉매적 효과를 나타내었다. 그러나 이들 diphosphine 착물들은 cyclic carbonate 생성반응 (2)에 대해 촉매제로서의 활성을 거의 나타내지 않았다.

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