• Bulletin of the Korean Chemical Society
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• 제25권7호
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• pp.986-990
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• 2004

Condensation of salicylaldehyde $(2-HOC_6H_4C(O)H)$ with allylamine afforded the unsaturated salicylaldimine, $2-HOC_6H_4C(H)=NCH_2CH=CH_2$. Similar reactivity was observed with substituted salicylaldehydes. Further reaction of these Schiff bases with palladium acetate or $Na_2PdCl_4$ afforded complexes of the type $PdL_2$, where L = deprotonated Schiff base. The molecular structure of the parent salicylaldimine palladium complex $[trans-(2-OC_6H_4C(H)=NCH_2CH=CH_2)_2Pd]$ (1) was characterized by an X-ray diffraction study. Crystals of 1 were monoclinic, space group $P2_1/n,\;a\;=\;14.0005(9)\;{\AA},\;b\;=7.2964(5)\;{\AA},\;c\;=\;17.5103(12)\;{\AA},\;{\beta}\;=\;100.189(1)^{\circ}$, Z = 4. Analogous chemistry with 4-vinylaniline also gave novel palladium complexes containing a pendant styryl group. Crystals of $[trans-(2-HOC_6H_4C(H)=N-4-C_6H_4CH=CH_2)_2Pd]$ (4) were monoclinic, space group $P2_1/c$, a = 13.7710(14) ${\AA}$, b = 11.0348(11) ${\AA}$, c = 7.8192(8) ${\AA}$, ${\beta}\;=\;98.817(2)^{\circ}$, Z = 2.

• 대한화학회지
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• 제26권1호
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• pp.31-35
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• 1982

Amberdentate 리간드인 isonitrosobenzoylacetone imine 및 N-알킬 치환제들의 새로운 팔라듐(Ⅱ) 착물 Pd(IBA-NH)(IBA-NH') 및 Pd(IBA-NR)2를 합성하였다. 여기서 IBA-NH 및 IBA-NR (R: methyl, ethyl, n-propyl, n-butyl, benzyl)은 각각 isonitrosobenzoylacetone imine 및 그 N-알킬 치환제를 표시한다. 합성한 팔라듐(II) 착물들의 적외선, 핵자기 공명, 전자 스펙트라 등을 측정한 결과 이들 착물 중에서 Pd(IBA-NH)(IBA-NH')는 IBA-NH는 이소니트로소기의 산소를 통하여 팔라듐에 배위되어 6각형 고리를 이루며 IBA-NH'는 이소니트로소기의 질소를 통하여 배위되어 5각형 고리를 이루고 있음을 확인하였다. 그리고 Pd$(IBA-NR)_2$는 양쪽의 IBA-NR이 같이 이소니트로소기의 질소를 통하여 배위되어 5각형 고리를 이루고 있음을 확인하였다. 이들 리간드의 배위구조는 $Bose^5$등에 의하여 알려진 isonitrosoacetylacetone imine 및 그 N-알킬 유도체들의 구조와 유사하다.

• Bulletin of the Korean Chemical Society
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• 제28권12호
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• pp.2435-2441
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• 2007

The catalytic enantioselective electrophilic fluorinations of active methane compounds promoted chiral palladium complexes have been developed. Treatment of α-cyano acetates and α-cyanoalkylphosphonates with N-fluorobenzenesulfonimide as the fluorine source under mild reaction conditions afforded the corresponding α-cyano-α-fluorinated adducts in high yields with excellent enantiomeric excesses (up to 99% ee). These reactions can be conducted in alcoholic solvents without any precaution to exclude water and moisture.

• Bulletin of the Korean Chemical Society
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• 제35권4호
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• pp.1121-1127
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• 2014

The design, synthesis, and structural characterization of two new palladium complexes based on Schiff base ligands is reported; $[Pd(L1)_2]$ (1) and $[Pd(L2)_2]$ (2), [HL1 = 2-((E)-(2,6-diethylphenylimino)methyl)-4,6-dibromophenol, L2 = (E)-N-benzylidene-2,6-diethylbenzenamine], which are obtained by functionalizing Schiff base ligands with or without electron-withdrawing groups. Both compounds are mononuclear structures. Comparisons are made to the compounds 1 and 2 to analyze and understand the effect of electron-withdrawing groups. Antibacterial activity studies indicate the electron-withdrawing groups on Schiff base ligands enhance antibacterial activity. Catalytic activity, however, is reduced due to the enhanced steric-hindrance of the electron-withdrawing groups. Electronic absorption and emission properties of HL1, L2, 1 and 2 are also reported.

• Bulletin of the Korean Chemical Society
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• 제33권12호
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• pp.4069-4073
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• 2012

Metallacyclodimeric complexes of $[(Me_4en)Pd(L)]_2(ClO_4)_4$ ($Me_4en$ = N,N,N',N'-tetramethylethylenediamine; L = dimethylbis(4-pyridyl)silane (dmps), methylvinylbis(4-pyridyl)silane (mvps)) have been synthesized, and their structures have been characterized by X-ray single crystallography. The skeletal structures consist of one 20-membered metallamacrocycle, two 5-membered metallacycles, and four pyridyl groups. The local geometry around the palladium(II) ion approximates to a typical square planar arrangement with four nitrogen donors. Delicate difference in catalytic effects on hydrogenation was investigated based on the structure of catalyst and substrates.

• Bulletin of the Korean Chemical Society
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• 제30권4호
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• pp.829-836
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• 2009

The catalytic enantioselective electrophilic fluorinations of active methine compounds promoted chiral palladium complexes have been developed. Treatment of $\beta$-keto phosphonates and $\beta$-ketoesters with N-fluorobenzenesulfonimide as the fluorine source under mild reaction conditions afforded the corresponding $\alpha$-fluorinated adducts in high yields with excellent enantiomeric excesses (up to 99% ee). These reactions can be conducted in alcoholic solvents without any precaution to exclude water and moisture.

• Bulletin of the Korean Chemical Society
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• 제18권11호
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• pp.1162-1166
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• 1997

Nature of palladium(Ⅱ) complexes with 7-membered chelates was studied by experimental and theoretical methods on a Pd(L)Cl2 system, where L is Ph2PNHCH2CH2NHPPh2(L1), Ph2PNHC6H4NHPPh2(L2). The palladium(Ⅱ) complexes were prepared and characterized by elemental analysis, IR, UV, 1H, and 31P NMR spectroscopy. Ab initio calculations with geometry optimizations were also performed for related model systems, Pd(L)Cl2; L=R2PNH(CH2)2NHPR2(L3), R2PNHC6H4NHPR2(L4), R2P(CH2)4PR2(L5), R2PCH2(C6H4)CH2PR2(L6); R=H, CH3.

• 대한화학회지
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• 제28권2호
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• pp.135-142
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• 1984

초과산화이온$(O_2^-)$의 발생원으로서 $KNO_2$를 사용하여 새로운 형태의 산착화합물가교팔라듐착화합물을 합성했다. 이 방법은 구핵치환과 전자 이동에 의한 반응으로서, 저원자가전이금속착화합물에 산소분자를 산화적으로 부가시켜 합성한 종전의 방법과는 완전히 다르다. $O_2^-$에 의하여 {\pi}$-알릴리간드를 갖는 새로운 형태의 5가지 산소가교팔라듐착화합물을 합성했다

• Bulletin of the Korean Chemical Society
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• 제31권12호
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• pp.3844-3847
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• 2010

• Bulletin of the Korean Chemical Society
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• 제15권11호
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• pp.945-949
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• 1994

Mixtures of cyano complexes of palladium(II) and platinum(II) were separated by capillary electrophoresis using a fused silica capillary as a separation column and 30 mM phosphate buffer (pH 7) containing 15 wt. % acetonitrile as a running buffer. By virtue of the high ionic mobilities of the negatively charged cyano complexes of Pd(II) and Pt(II), they were separated using a cathodic injection and anodic detection scheme. The metal complexes eluted through the capillary were detected by direct UV absorption at 214 nm. A linear relationship between peak area and concentration was obtained for both ions and the detection limit was lower than $10^{-14}$ mole. The proposed method was applied to real sample, e.g., anode slime obtained from an electrolytic copper refinary, as a method for the simultaneous determination of palladium and platinum.