• Bulletin of the Korean Chemical Society
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• 제31권7호
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• pp.1945-1950
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• 2010

Solvent extraction experiments of Pt(IV), Pd(II) and Rh(III) by Alamine336 were performed from the mixed chloride solutions. In the HCl concentration range from 1 to 5 M, most of Pt and Pd were extracted from the mixed solutions. However, the extraction percentage of Rh was much smaller than that of Pt and Pd. Lower concentration of Alamine336 in strong HCl solution led to higher separation factor of Rh from Pt and Pd. Adding $SnCl_2$ to the mixed solutions increased the extraction percentage of Rh, while the extraction percentage of Pt and Pd was little affected. Our results showed that selective separation of Rh or coextraction of the three platinum group metals from the mixed solution would be possible by adjusting the extraction conditions.

• 약학회지
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• 제35권4호
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• pp.264-270
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• 1991

An efficient synthetic route to carbocycle is described. 1, 1, 2-Trisubstituted cycloheptane has been synthesized from allylic carbonate by Pd(0) catalzyed cyclization.

• Bulletin of the Korean Chemical Society
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• 제31권12호
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• pp.3815-3817
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• 2010

• Bulletin of the Korean Chemical Society
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• 제9권4호
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• pp.198-202
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• 1988

Several new palladium(II) complexes of aminophosphines, $(Pd(L)X_2)$, (L = $Ph_2PNH$ ++ $NR_2$; R = $CH_3(L_1)$, $C_2H_5(L_2)$ : X = Cl, Br, I, and NCS) that contain two different donor atoms of nitrogen and phosphorus as ${\pi}$-electron acceptor, were synthesized and characterized by conductivity measurement, ir, and UV/Vis-spectra. For the dithiocyanatopalladium(II) complexes with aminophosphines, it was confirmed that the thiocyanate group trans to phosphorus is coordinated as Pd-NCS mode and the one trans to nitrogen as Pd-SCN mode, and the aminophosphines form six-membered chelate ring. The spectra of dihalogenopalladium(II) complexes with aminophosphines show that the band maxima are shifted to the short wavelengths as the concentration is decreased.

• Mass Spectrometry Letters
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• 제14권3호
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• pp.110-115
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• 2023

The reaction of (COD)PdCl₂ with new C₃-symmetric tridentate L (COD = 1,5-cyclooctadien; L = 1,3,5-tris(picolinoyloxyethyl)cyanurate) in a mixture of acetone and dichloromethane produces single crystals consisting of unprecedented monometallacyclic [PdCl₂(L)]. This cyclic compound arises from trans-chelation of two of three donating pyridyl groups of L, while the third pyridyl group remains uncoordinated. Electrospray ionization mass spectrometry (ESI-MS) data on L exhibited the major peak corresponding to [C₂₇H₂₄N₆O₉ + H⁺]⁺. Fast atom bombardment mass spectrometry (FABMS) data on [PdCl₂(L)], however, showed the mass peak corresponding to the L instead of the present palladium(II) compound species, due to the insolubility and dissociation in solution. The physicochemical properties of the present palladium(II) compound were fully characterized by means of infrared (IR) and nuclear magnetic resonance (NMR) spectroscopy, thermal analysis, single-crystal X-ray diffraction (SC-XRD) measurement.

• 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.

• 대한화학회지
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• 제29권5호
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• pp.490-495
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• 1985

팔라듐(II)의 새로운 착물인 $[Pd((ieaa)_2-en)]$ 및 [PdCl((ieaa)-l-pn)]을 합성하였다. 여기서 $(ieaa)_2-en$과 (ieaa)-l-pn은 각각 N,N'-ethylenebis(isonitrosoethylacetoacetate imine) 및 l-N-(2-aminopropyl)-isonitrosoethylacetoacetate imine을 표시한다. 합성된 이들 팔라듐(II) 착물들은 전자흡수(AB) 스펙트럼, 원이색성(CD) 스펙트럼, C-13핵자기공명스펙트럼, 적외선 및 라만스펙트럼등의 측정결과를 기초로 그 특성을 연구하였다. 염화팔라듐(II)과 ethylenediamine을 첨가한 isonitrosoethylacetoacetate (ieaa)와의 반응에서 생성된 팔라듐착물에서는 $(ieaa)_2-en$형의 Schiff 염기, 한편 ethylenediamine 대신 l-propylenediamine을 사용한 비슷한 반응으로 생성된 착물에서는 (ieaa)-l-pn형의 Schiff염기로 나타낸다. 이러한 구조형성의 차이를 사용된 diamine의 입체화학적 관점에서 검토한다.

• 한국결정학회지
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• 제9권1호
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• pp.71-76
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• 1998

Bis(ethylenediamine)palladium(II)-Bis(oxalato)palladate(II0, (Pd(C2H8N2)2.Pd(C2O4)2)의 단위 착이온 및 결정의 구조들을 x-선 회절법으로 연구하였다. 이 결정은 단사정계이고, 공간군은 P21/c(군 번호=14)이다. 단위세포는 a=6.959(2), b=13.506(2), c=15.339(2) Å, β=99.94(3)이며, V=1420 Å3, Fw=509.04 Dc=2.380 gcm-3, F(000)=992, μ=25.46 cm-1 Z=4이다. 회절반점들의 세기는 흑연 단색화 장치가 있는 자동 4축 회절기로 얻었으며 Mo-KαX-선 (λ=0.7107 Å)을 사용하였다. 구조분석은 중금속법으로 풀었으며, 최소자승법으로 정밀화하였고, 최종 신뢰도 값들은 1472개의 회절반점에 대하여 R=0.021, Rw=0.030, Rall=0.032 및 S=2.10이었다. 착음이온들은 근본적인 평면구조로써, 이들의 충진구조는 a-축을 따라서 면간거리가 3.41Å인 이중체가 3.44Å 간격으로 배열되어있다.

• 한국균학회지
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• 제25권3호통권82호
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• pp.167-175
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• 1997

Penicillium diversum KCTC 6786으로부터 두개의 chitin synthase 유전자 절편(PdCHSl과 PdCHS2)을 PCR로 증폭하고 cloning하였다. PdCHSl과 PdCHS2는 primer 서열을 제외하면 각각 570 bp 길이의 연속된 open reading frame (ORF)을 포함하고 있었다. BLASTP를 이용하여 유추된 아미노산 서열의 유사도를 분석한 결과, P. diversum은 자낭균류와 상당한 진화적 유연관계가 있음을 알 수 있었다. 이들 아미노산 서열을 CLASTAL W를 이용하여 분석한 결과, 본 실험에서 분리된 두 유전자 절편은 Bowen 등 (1992)이 제시한 몇 부류 중 서로 다른 부류, 즉, PdCHSl은 Class I에, PdCHS2는 Class II에 각각 속하는 것으로 확인되었다. 또한, Southern blot 분석을 통하여, 각 유전자는 P. diversum KCTC 6786의 genome에 1개씩만 존재함을 알 수 있었다.

• 분석과학
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• 제36권4호
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• pp.198-203
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• 2023

The reaction of cis-protected (Me4en)Pd(II) species with potentially multidentate bis(benzylthio)methylenepropanedioate (L) was carried out to obtain a monometallic compound, [(Me₄en)Pd(L)], in O,O'-coordination mode. The bis(benzylthio)methylene group was bent strikingly from the palladium square plane at the dihedral angle of 70.40°. The physicochemical properties of the present palladium(II) compound were fully characterized by means of infrared and nuclear magnetic resonance spectroscopy, thermogravimetric analysis, and single-crystal X-ray diffraction measurement.