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1.
Treatment of Pd(PPh3)4 with 5‐bromo‐pyrimidine [C4H3N2Br] in dichloromethane at ambient temperature cause the oxidative addition reaction to produce the palladium complex [Pd(PPh3)2(η1‐C4H3N2)(Br)], 1 , by substituting two triphenylphosphine ligands. In acetonitrile solution of 1 in refluxing temperature for 1 day, it do not undergo displacement of the triphenylphosphine ligand to form the dipalladium complex [Pd(PPh3)Br]2{μ,η2‐(η1‐C4H3N2)}2, or bromide ligand to form chelating pyrimidine complex [Pd(PPh3)2(η2‐C4H3N2)]Br. Complex 1 reacted with bidentate ligand, NH4S2CNC4H8, and tridentate ligand, KTp {Tp = tris(pyrazoyl‐1‐yl)borate}, to obtain the η2‐dithiocarbamate η1‐pyrimidine complex [Pd(PPh3)(η1‐C4H3N2)(η2‐S2CNC4H8)], 4 and η2‐Tp η1‐pyrimidine complex [Pd(PPh3)(η1‐C4H3N2)(η2‐Tp)], 5 , respectively. Complexes 4 and 5 are characterized by X‐ray diffraction analyses. 相似文献
2.
Two Pseudopolymorphic Star‐Shaped Tetranuclear Co3+ Compounds with Disulfide Anions Exhibiting Two Different Connection Modes and Promising Photocatalytic Properties
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Dr. Nicole Pienack Henning Lühmann John Djamil Stefan Permien Prof. Dr. Christian Näther Sebastian Haumann Dr. Richard Weihrich Prof. Dr. Wolfgang Bensch 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(39):13637-13645
The compound [Co4(C6H14N2)4(μ4‐S2)2(μ2‐S2)4] ( I ) and the pseudo‐polymorph [Co4(C6H14N2)4(μ4‐S2)2(μ2‐S2)4] ? 4 H2O ( II ) were obtained under solvothermal conditions (C6H14N2=trans‐1,2‐diaminocyclohexane). The structures feature S22? ions exhibiting two different coordination modes. Terminal S22? entities join two Co3+ centres in a μ2 fashion, whereas the central S22? groups connect four Co3+ cations in a μ4‐ coordination mode. Compound II can be transformed into compound I by heat and storage over P2O5 and storing compound I in humid air yields in the formation of compound II . The intermolecular interactions investigated through Hirshfeld surface analysis reveal that besides S???H bonding close contacts are associated with relatively weak H???H interactions. A detailed DFT analysis of the bonding situation explains the long S?S bonds in the μ4‐bridging S22? units and the short bonds for the S22? moieties in the μ2‐connecting mode. Photocatalytic hydrogen evolution experiments demonstrate the potential of compound II as catalyst. 相似文献
3.
Edward D. Cross Kristen L. MacDonald Robert McDonald Matthias Bierenstiel 《Acta Crystallographica. Section C, Structural Chemistry》2014,70(1):23-27
The reaction of dichlorido(cod)palladium(II) (cod = 1,5‐cyclooctadiene) with 2‐(benzylsulfanyl)aniline followed by heating in N,N‐dimethylformamide (DMF) produces the linear trinuclear Pd3 complex bis(μ2‐1,3‐benzothiazole‐2‐thiolato)bis[μ2‐2‐(benzylsulfanyl)anilinido]dichloridotripalladium(II) N,N‐dimethylformamide disolvate, [Pd3(C7H4NS2)2(C13H12NS)2Cl2]·2C3H7NO. The molecule has symmetry and a Pd...Pd separation of 3.2012 (4) Å. The outer PdII atoms have a square‐planar geometry formed by an N,S‐chelating 2‐(benzylsulfanyl)anilinide ligand, a chloride ligand and the thiolate S atom of a bridging 1,3‐benzothiazole‐2‐thiolate ligand, while the central PdII core shows an all N‐coordinated square‐planar geometry. The geometry is perfectly planar within the PdN4 core and the N—Pd—N bond angles differ significantly [84.72 (15)° for the N atoms of ligands coordinated to the same outer Pd atom and 95.28 (15)° for the N atoms of ligands coordinated to different outer Pd atoms]. This trinuclear Pd3 complex is the first example of one in which 1,3‐benzothiazole‐2‐thiolate ligands are only N‐coordinated to one Pd centre. The 1,3‐benzothiazole‐2‐thiolate ligands were formed in situ from 2‐(benzylsulfanyl)aniline. 相似文献
4.
Félix Zamora Víctor M. González José M. Pérez José R. Masaguer Carlos Alonso Carmen Navarro-Ranninger 《应用有机金属化学》1997,11(8):659-666
In this paper we describe the synthesis and chemical characterization of three new Pd(II)–imidazoline complexes: [PdCl2 (C6H5–CH2–C3H5N2)2] (2), [PdCl(SEt2) (C6H4-C3H5N2)] (5) and [Pd(C6H4-C3H5N2) (μ-Br)]2 (6). We have also analyzed the DNA modifications and in vitro antileukaemic activity of these compounds and of their previously reported analogs [Pd Cl2 (C6H5–C3H5N2)2] (1), [Pd (C6H4–C3H5N2) (μ-OAc)]2 (3), [Pd (C6H4–C3H5N2) (μ-Cl)]2 (4) and [Pt(C6H4–C3H5N2)(μ-Cl] (7). All these compounds modify the DNA secondary structure since they alter the melting temperature (Tm) of the DNA. Circular dichroism spectra indicated, moreover, that compounds 3, 5 and 6 induced higher modification on the double helix than compounds 1, 2 and 4. While compounds 1, 2 and 5 seem to induce slight changes in the electrophoretic mobility of the open and covalently closed circular forms of pUC8 DNA at high ri (input molar ratio of Pd or Pt to nucleotides), compounds 3, 6 and 7 do not modify at any ri the tertiary structure of the plasmid DNA. Antileukaemic tests suggest that compounds 1, 4 and 7 exhibit important cytotoxic activity since their IC50 values against HL-60 human leukaemic cells were below 10 μg ml−1. © 1997 John Wiley & Sons, Ltd. 相似文献
5.
Prof. Dr. Wolfram W. Seidel Woldemar Dachtler Julia Semmler Marco Tänzler Manuel Folk Dr. Alexander Villinger 《Chemistry (Weinheim an der Bergstrasse, Germany)》2013,19(43):14702-14711
A series of heterodinuclear complexes with acetylene dithiolate (acdt2?) as the bridging moiety were synthesised by a facile one‐pot procedure that avoided use of the highly elusive acetylene dithiol. Generation of the W–Ru complex [Tp′W(CN)(CO)(C2S2)Ru(η5‐C5H5)(PPh3)] (Tp’=hydrotris(3,5‐dimethylpyrazolyl)borate) and the W–Pd complexes [Tp′W(CN)(CO)(C2S2)Pd(dppe)] and [Tp′W(CO)2(C2S2)Pd(dppe)][PF6] (dppe=1,2‐bis(diphenylphoshino)ethane), which exhibit a [W(η2‐κ2‐C2S2)M] core (M=Ru, Pd), was accomplished by using a transition‐metal‐assisted solvolytical removal of the Me3Si‐ethyl thiol protecting groups. All intermediate species of the reaction have been fully characterised. The highly coloured W–Ru complex [Tp′W(CN)(CO)(C2S2)Ru(η5‐C5H5)(PPh3)] shows reversible redox chemistry, as does the prototype complex [Tp′W(CO)2(C2S2)Ru(η5‐C5H5)(PPh3)][PF6]. Single crystal X‐ray diffraction and IR, EPR and UV/Vis spectroscopic studies in conjunction with DFT calculations prove the high electronic delocalisation of states over the acdt2? linker. Comparative studies revealed a higher donor strength and more pronounced dithiolate character of acdt2? in [Tp′W(CN)(CO)(C2S2)Ru(η5‐C5H5)(PPh3)] relative to [Tp′W(CO)2(C2S2)Ru(η5‐C5H5)(PPh3)]+. In addition, the influence of the overall complex charge on the metric parameters was investigated by single‐crystal X‐ray diffraction studies with the W–Pd complexes [Tp′WL2(C2S2)Pd(dppe)] (L=(CN?)(CO) or (CO)2). The central [W(C2S2)Pd] units exhibit high structural similarity, which indicates the extensive delocalisation of charge over both metals. 相似文献
6.
Hiroshi Katagiri Masao Morimoto Kenichi Sakai 《Acta Crystallographica. Section C, Structural Chemistry》2009,65(7):o357-o360
The structures of diastereomeric pairs consisting of (S)‐ and (R)‐2‐methylpiperazine with (2S,3S)‐tartaric acid are both 1:1 salts, namely (S)‐2‐methylpiperazinium (2S,3S)‐tartrate dihydrate, C5H14N22+·C4H4O62−·2H2O, (I), and (R)‐2‐methylpiperazinium (2S,3S)‐tartrate dihydrate, C5H14N22+·C4H4O62−·2H2O, (II), which reveal the formation of well defined ammonium carboxylate salts linked via strong intermolecular hydrogen bonds. Unlike the situation in the more soluble salt (II), the alternating columns of tartrate and ammonium ions of the less soluble salt (I) are packed neatly in a grid around the a axis, which incorporates water molecules at regular intervals. The increased efficiency of packing for (I) is evident in its lower `packing coefficient', and the hydrogen‐bond contribution is stronger in the more soluble salt (II). 相似文献
7.
Structural and Photophysical Study on Heterobimetallic Complexes with d8–d10 Interactions Supported by Carborane Ligands: Theoretical Analysis of the Emissive Behaviour
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Dr. Olga Crespo Prof. M. Concepción Gimeno Prof. Antonio Laguna Dr. Olli Lehtonen Dr. Isaura Ospino Prof. Pekka Pyykkö Dr. M. Dolores Villacampa 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(11):3120-3127
Heterobimetallic complexes of formula [M{(PPh2)2C2B9H10}(S2C2B10H10)M′(PPh3)] (M=Pd, Pt; M′=Au, Ag, Cu) and [Ni{(PPh2)2C2B9H10}(S2C2B10H10)Au(PPh3)] were obtained from the reaction of [M{(PPh2)2C2B10H10}(S2C2B10H10)] (M=Pd, Pt) with [M′(PPh3)]+ (M′=Au, Ag, Cu) or by one‐pot synthesis from [(SH)2C2B10H10], (PPh2)2C2B10H10, NiCl2 ? 6 H2O, and [Au(PPh3)]+. They display d8–d10 intermetallic interactions and emit red light in the solid state at 77 K. Theoretical studies on [M{(PPh2)2C2B9H10}(S2C2B10H10)Au(PPh3)] (M=Pd, Pt, Ni) attribute the luminescence to ligand (thiolate, L)‐to‐“P2‐M‐S2” (ML′) charge‐transfer (LML′CT) transitions for M=Pt and to metal (M)‐to‐“P2‐M‐S2” (ML′) charge‐transfer (MML′CT) transitions for M=Ni, Pd. 相似文献
8.
Enantiomerically pure bis‐heterocycles containing a (S)‐proline moiety have been prepared starting from (S)‐N‐benzylprolinehydrazide ( 2b ). The reactions with isothiocyanates or butyl isocyanate in refluxing MeOH led to the corresponding thiosemicarbazide 5 and semicarbazide 9 with a N‐benzylprolinoyl residue. The structure of the tert‐butyl derivative 5d was established by X‐ray crystallography. Base‐catalyzed cyclization of 5 and 9 led to (S)‐3‐(pyrrolidin‐2‐yl)‐1H‐1,2,4‐triazole‐5(4H)‐thiones 6 and the corresponding 5(4H)‐one 8 , respectively, whereas, in concentrated H2SO4, compounds 5 undergo cyclization to give (S)‐5‐amino‐2‐(pyrrolidin‐2‐yl)‐1,3,4‐thiadiazoles 7 . Furthermore, 2b reacted with hexane‐2,5‐dione in boiling iPrOH to yield the (S)‐N‐(2,5‐dimethylpyrrol‐1‐yl)prolinamide 10 . In the case of the bis‐heterocycle 8 , treatment with HCOONH4 and Pd/C in MeOH gave the debenzylated product 12 . 相似文献
9.
In this paper, self‐assembled Prussian blue nanoparticles (PBNPs) on carbon ceramic electrode (CCE) were developed as a high sensitive hydrogen peroxide (H2O2) electrochemical sensor. The PBNPs film was prepared by a simple dipping method. The morphology of the PBNPs‐modified CCE was characterized by scanning electron microscopy (SEM). The self‐assembled PB film exhibited sufficient mechanical, electrochemical stability and high sensitivity in compare with other PB based H2O2 sensors. The sensor showed a good linear response for H2O2 over the concentration range 1 μM–0.26 mM with a detection limit of ca. 0.7 μM (S/N=3), and sensitivity of 754.6 mA M?1 cm?2. This work demonstrates the feasibility of self‐assembled PBNPs‐modified CCE for practical sensing applications. 相似文献
10.
Beatrice Calmuschi‐Cula Irmgard Kalf Claudia Timofte Ulli Englert 《Acta Crystallographica. Section C, Structural Chemistry》2009,65(2):m48-m51
The crystal structures of (SP‐4‐4)‐[rac‐2‐(1‐aminoethyl)phenyl‐κ2C1,N]chlorido(pyridine‐κN)palladium(II), [Pd(C8H10N)Cl(C5H5N)], (I), (SP‐4‐4)‐[rac‐2‐(1‐aminoethyl)phenyl‐κ2C1,N]bromido(pyridine‐κN)palladium(II), [PdBr(C8H10N)(C5H5N)], (II), (SP‐4‐4)‐[rac‐2‐(1‐aminoethyl)‐5‐bromophenyl‐κ2C1,N]bromido(4‐methylpyridine‐κN)palladium(II), [PdBr(C8H9BrN)(C6H7N)], (III), and (SP‐4‐4)‐[rac‐2‐(1‐aminoethyl)‐5‐bromophenyl‐κ2C1,N]iodido(4‐methylpyridine‐κN)palladium(II), [Pd(C8H9BrN)I(C6H7N)], (IV), are reported. The latter is the first iodide complex in this class of compounds. All four complexes crystallize in the same space group, viz.I41/a, with very similar lattice parameters a and more flexible lattice parameters c. Their packing corresponds to that of their enantiomerically pure congeners, which crystallize in the t2 subgroup I41. 相似文献
11.
Ya‐Yun Zhao Xiu‐Hua Zhao Jie Zhang Jian‐Guo Pan Xing Li 《Acta Crystallographica. Section C, Structural Chemistry》2013,69(10):1096-1099
catena‐Poly[[bis{4‐[(pyrimidin‐2‐ylazanidyl)sulfonyl]aniline}cobalt(II)]‐bis[μ‐1,3‐bis(pyridin‐4‐yl)propane]], [Co(C10H8N4O4S2)2(C13H14N2)]n or [Co(L)2(bpp)]n, crystallizes as a one‐dimensional polymeric structure which is further stabilized by intermolecular hydrogen bonding. The refined Flack parameter, −0.001 (10), indicates that the model represents the correct absolute structure. Investigation of the thermal stability shows that the complex is stable up to 543 K. The structure is of interest with respect to its electrochemical properties in the reduction reaction of H2O2 to H2O. 相似文献
12.
Pd(II) complexes of Schiff bases and their application as catalysts in Mizoroki–Heck and Suzuki–Miyaura cross‐coupling reactions
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Schiff bases of 2‐(phenylthio)aniline, (C6H5)SC6H4N?CR (R = (o‐CH3)(C6H5), (o‐OCH3)(C6H5) or (o‐CF3)(C6H5)), and their palladium complexes (PdLCl2) were synthesized. The compounds were characterized using 1H NMR and 13C NMR spectroscopy and micro analysis. Also, electrochemical properties of the ligands and Pd(II) complexes were investigated in dimethylformamide–LiClO4 solution with cyclic and square wave voltammetry techniques. The Pd(II) complexes showed both reversible and quasi‐reversible processes in the ?1.5 to 0.3 V potential range. The synthesized Pd(II) complexes were evaluated as catalysts in Mizoroki–Heck and Suzuki–Miyaura cross‐coupling reactions. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
13.
Palladium Nanoparticles Embedded into Graphene Nanosheets: Preparation,Characterization, and Nonenzymatic Electrochemical Detection of H2O2
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A novel nonenzymatic H2O2 sensor based on a palladium nanoparticles/graphene (Pd‐NPs/GN) hybrid nanostructures composite film modified glassy carbon electrode (GCE) was reported. The composites of graphene (GN) decorated with Pd nanoparticles have been prepared by simultaneously reducing graphite oxide (GO) and K2PdCl4 in one pot. The Pd‐NPs were intended to enlarge the interplanar spacing of graphene nanosheets and were well dispersed on the surface or completely embedded into few‐layer GN, which maintain their high surface area and prevent GN from aggregating. XPS analysis indicated that the surface Pd atoms are negatively charged, favoring the reduction process of H2O2. Moreover, the Pd‐NPs/GN/GCE could remarkably decrease the overpotential and enhance the electron‐transfer rate due to the good contact between Pd‐NPs and GN sheets, and Pd‐NPs have high catalytical effect for H2O2 reduction. Amperometric measurements allow observation of the electrochemical reduction of H2O2 at 0.5 V (vs. Ag/AgCl). The H2O2 reduction current is linear to its concentration in the range from 1×10?9 to 2×10?3 M, and the detection limit was found to be 2×10?10 M (S/N=3). The as‐prepared nonenzymatic H2O2 sensor exhibits excellent repeatability, selectivity and long‐term stability. 相似文献
14.
Udo Beckmann Sally Brooker 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(11):o653-o655
The structure of the cocrystallized 1:1 adduct of (S,S)‐4‐amino‐3,5‐bis(1‐hydroxyethyl)‐1,2,4‐triazole and (S,S)‐1,2‐bis(2‐hydroxypropionyl)hydrazine, C6H12N4O2·C6H12N2O4, has tetragonal symmetry. All eight O‐ and N‐bound H atoms are involved in intermolecular hydrogen bonds, resulting in infinite zigzag chains of the triazole molecules, with the hydrazine molecules filling the gaps between the chains and completing a three‐dimensional hydrogen‐bonded array. 相似文献
15.
M. T. H. Tarafder M. A. A. A. A. Islam M. B. H. Howlader N. Guidolin E. Zangrando 《Acta Crystallographica. Section C, Structural Chemistry》2010,66(12):m363-m365
In the title compound, [Pd(C23H29N2OS2)2], the PdII atom displays the expected square‐planar coordination geometry. However, the trans configuration, which allows the PdII atom to be located on a crystallographic inversion centre, is unusual with respect to the cis arrangement found in analogous Pd complexes comprising similar N,S‐chelating ligands. 相似文献
16.
Günter Reck Roland Becker 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(3):m134-m136
Bis(N,N‐di‐n‐butyldithiocarbamato‐κ2S,S′)(1,10‐phenanthroline‐κ2N,N′)zinc(II) ethanol hemisolvate, [Zn(C9H18NS2)2(C12H8N2)]·0.5C2H6O, (I), and bis(N,N‐di‐n‐hexyldithiocarbamato‐κ2S,S′)bis(1,10‐phenanthroline‐κ2N,N′)calcium(II), [Ca(C13H26NS2)2(C12H8N2)2], (II), are mixed‐ligand complexes. In the first compound, the Zn atom has a distorted octahedral coordination, while in the second compound, the Ca atom is eight‐coordinate, with four S and four N atoms forming a highly distorted cube. 相似文献
17.
《Journal of organometallic chemistry》2007,692(1-3):257-262
The redox reaction of bis(2-benzamidophenyl) disulfide (H2L-LH2) with [Pd(PPh3)4] in a 1:1 ratio gave mononuclear and dinuclear palladium(II) complexes with 2-benzamidobenzenethiolate (H2L−), [Pd(H2L-S)2(PPh3)2] (1) and [Pd2(H2L-S)2 (μ-H2L-S)2(PPh3)2] (2). A similar reaction with [Pt(PPh3)4] produced only the corresponding mononuclear platinum(II) complex, [Pt(H2L-S)2(PPh3)2] (3). Treatment of these complexes with KOH led to the formation of cyclometallated palladium(II) and platinum(II) complexes, [Pd(L-C,N,S)(PPh3)]− ([4]−) and [Pt(L-C,N,S) (PPh3)]− ([5]−). The molecular structures of 2, 3 and [4]− were determined by X-ray crystallography. 相似文献
18.
Tullio Pilati Gianluigi Casalone 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(3):o178-o180
The title diastereoisomers, methyl 5‐(S)‐[2‐(S)‐methoxycarbonyl)‐2,3,4,5‐tetrahydropyrrol‐1‐ylcarbonyl]‐1‐(4‐methylphenyl)‐4,5‐dihydropyrazole‐3‐carboxylate and methyl 5‐(S)‐[2‐(R)‐methoxycarbonyl)‐2,3,4,5‐tetrahydropyrrol‐1‐ylcarbonyl]‐1‐(4‐methylphenyl)‐4,5‐dihydropyrazole‐3‐carboxylate, both C19H23N3O5, have been studied in two crystalline forms. The first form, methyl 5‐(S)‐[2‐(S)‐methoxycarbonyl)‐2,3,4,5‐tetrahydropyrrol‐1‐ylcarbonyl]‐1‐(4‐methylphenyl)‐4,5‐dihydropyrazole‐3‐carboxylate–methyl 5‐(S)‐[2‐(R)‐methoxycarbonyl)‐2,3,4,5‐tetrahydropyrrol‐1‐ylcarbonyl]‐1‐(4‐methylphenyl)‐4,5‐dihydropyrazole‐3‐carboxylate (1/1), 2(S),5(S)‐C19H23N3O5·2(R),5(S)‐C19H23N3O5, contains both S,S and S,R isomers, while the second, methyl 5‐(S)‐[2‐(S)‐methoxycarbonyl)‐2,3,4,5‐tetrahydropyrrol‐1‐ylcarbonyl]‐1‐(4‐methylphenyl)‐4,5‐dihydropyrazole‐3‐carboxylate, 2(S),5(S)‐C19H23N3O5, is the pure S,S isomer. The S,S isomers in the two structures show very similar geometries, the maximum difference being about 15° on one torsion angle. The differences between the S,S and S,R isomers, apart from those due to the inversion of one chiral centre, are more remarkable, and are partially due to a possible rotational disorder of the 2‐(methoxycarbonyl)tetrahydropyrrole group. 相似文献
19.
The sol‐gel metathesis reaction was used to synthesize a new family of aerogels called a rare‐earth chalcophosphate aerogel KY(P2S6)2 · K+ and the rare‐earth metal cations Y3+ connect [P2S6]2– anions to form an amorphous white gel. Supercritical drying of the resulting gel produced porous materials with a BET surface area of 443 m2 · g–1. The adsorption properties of the rare‐earth chalcophosphate aerogel were studied using volatile organic hydrocarbons (VOCs) and gases as adsorptives. The results showed preferential adsorption of toluene vapor over cyclohexane and cyclopentane vapor. The adsorption capacity toward toluene was 703 mg · g–1. Favored adsorption of CO2 over CH4, N2, or H2 was also observed for the aerogel: KY(P2S6)2 (CO2/H2: 308, CO2/CH4: 67, Co2/N2: 177). Pd doped aerogel showed significant enhancement toward toluene (1291 mg · g–1) for 1 wt % Pd @ KY(P2S6)2, (2064 mg · g–1) for 3 wt % Pd @ KY(P2S6)2 and (1108 mg · g–1) for 5 wt % Pd @ KY(P2S6)2. It also showed a noticeable improvement in the gas selectivity (CO2/H2: 337, CO2/CH4: 85, Co2/N2: 205) for 1 wt % Pd @ KY(P2S6)2, (CO2/H2: 345, CO2/CH4: 109, Co2/N2: 212) for 3 wt % Pd @ KY(P2S6)2 and (CO2/H2: 319, CO2/CH4: 73, Co2/N2: 187) for 5 wt % Pd @ KY(P2S6)2. 相似文献
20.
Dale C. Swenson Vasu Nair Sanjib Bera 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(8):e343-e345
We have synthesized two isomeric dideoxynucleosides. 4(S)‐(6‐Amino‐9H‐purin‐9‐yl)‐3‐methylene‐2,3,4,5‐tetrahydrofuran‐2(S)‐ylmethanol, C11H13N5O2, is an analogue of the anti‐HIV compound (S,S)‐isodideoxyadenosine (isoDDA) with an exocyclic methylene group and is found to be anti‐HIV inactive. The solid‐state comformation is very similar to that of isoDDA. 4(S)‐(6‐Amino‐3H‐purin‐3‐yl)‐3‐methylene‐2,3,4,5‐tetrahydrofuran‐2(S)‐ylmethanol, C11H13N5O2, has an isomeric arrangement of the carbohydrate and base moieties, as confirmed by the crystal structure analysis. The asymmetric unit contains two independent molecules that differ in conformations at the sugar moiety. 相似文献