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A novel palladium complex 4, cis‐dichloride(1,2‐bis(diphenylphosphino)vinyl‐P,P′,C)palladium(II)‐(bis(diphenylphosphino)methane‐P,P′)cobaltacarbonyl, was obtained and characterized from the treatment of [(μ‐Ph2PCH2PPh2)Co2(CO)4][(Ph2PC≡CPPh2)‐PdCl2] 3 with hydrochloric acid. The framework of 4 can be regarded as a grouping of two metal‐containing fragments: ‐Co(CO)2(dppm) and PdCl2(μ‐P,P‐Ph2PCH=C(‐)PPh2). 相似文献
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P. Metzger Cotts 《Journal of Polymer Science.Polymer Physics》1986,24(7):1493-1507
An aromatic semirigid polyquinoline, poly[2,2′-(p,p′-oxydi-p-phenylene) 6,6′-oxybis(4-phenylquinoline)], has been studied in dilute solution using viscometry, light scattering, and size-exclusion chromatography coupled with low-angle light-scattering detection (SEC/LALS). The SEC/LALS technique permits determination of the intrinsic viscosity and absolute molecular weight for a series of narrow fractions without preparative fractionation. Aggregation that was observed in dilute chloroform solutions was found to be related to protonation of the polyquinoline by HCI present in chloroform. Unperturbed dimensions calculated from the SEC/LALS results show the chain to have nearly freely rotating dimensions, as expected for a chain composed of long (12-Å) rigid segments connected by ether linkages. 相似文献
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Clemens Taube Kai Schwedtmann Medena Noikham Ekasith Somsook Felix Hennersdorf Robert Wolf Jan J. Weigand 《Angewandte Chemie (International ed. in English)》2020,59(9):3585-3591
[LCRP((PhP)2C2H4)][OTf] ( 4 a,b [OTf]) and [LCiPrP(PPh2)2][OTf] ( 5 b [OTf]) were prepared from the reaction of imidazoliumyl‐substituted dipyrazolylphosphane triflate salts [LCRP(pyr)2][OTf] ( 3 a,b [OTf]; a : R=Me, b =iPr; LCR=1,3‐dialkyl‐4,5‐dimethylimidazol‐2‐yl; pyr=3,5‐dimethylpyrazol‐1‐yl) with the secondary phosphanes PhP(H)C2H4P(H)Ph) and Ph2PH. A stepwise double P?N/P?P bond metathesis to catena‐tetraphosphane‐2,3‐diium triflate salt [(Ph2P)2(LCMeP)2][OTf]2 ( 7 a [OTf]2) is observed when reacting 3 a [OTf] with diphosphane P2Ph4. The coordination ability of 5 b [OTf] was probed with selected coinage metal salts [Cu(CH3CN)4]OTf, AgOTf and AuCl(tht) (tht=tetrahydrothiophene). For AuCl(tht), the helical complex [{(Ph2PPLCiPr)Au}4][OTf]4 ( 9 [OTf]4) was unexpectedly formed as a result of a chloride‐induced P?P bond cleavage. The weakly coordinating triflate anion enables the formation of the expected copper(I) and silver(I) complexes [( 5 b )M(CH3CN)3][OTf]2 (M=Cu, Ag) ( 10 [OTf]2, 11 [OTf]2). 相似文献
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Yi‐Zhi Li Jia‐Cheng Liu Zhi‐Ping Wang Qin‐Xi Li Gang‐Chun Sun Liu‐Fang Wang Chun‐Gu Xia 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(7):e286-e287
The title compound, [Ni(Ph2PCH2PPh2)2](ClO4)2, was synthesized and its structure determined crystallographically. The Ni atom lies on an inversion centre and is at the center of a square formed by four P atoms which are necessarily coplanar. The Ni—P distances are 2.2188 (5) and 2.2322 (5) Å, and the P—Ni—P angle is 73.12 (3)°. The unique perchlorate anion is not coordinated to the Ni atom. 相似文献
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Duncan A. J. Harding Eric G. Hope Gregory A. Solan John Fawcett 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(8):m383-m384
In the crystal structure of the title compound, [RuF2(C26H24P2)2]·2CHCl3, the Ru atom lies on a centre of symmetry with a trans arrangement of the F atoms. A H...F contact (2.249 Å) suggests weak intramolecular hydrogen bonding. The solvent molecules exhibit hydrogen bonding with the F atoms (H...F = 1.91 Å). 相似文献
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Lars V. Andreasen Alan Hazell Ole Wernberg 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(7):m385-m387
In the title compound, [Pt(C18H15P)(C28H28P2S)](ClO4)2·C3H6O or [Pt(PPh3)(PSP)](ClO4)2·CH3COCH3, where PSP is the potentially tridentate chelate ligand bis(2‐diphenylphosphinoethyl) sulfide, all three donor groups of the PSP ligand are coordinated to the central Pt atom, with Pt—P = 2.310 (1) Å and Pt—S = 2.343 (1) Å. The fourth coordination site is occupied by the P donor of the triphenylphosphine ligand [Pt—P = 2.289 (1) Å]. The complex cation has exact mirror symmetry, with the S atom, the Pt atom and the P atom of the PPh3 ligand in the mirror plane. The Pt atom has a distorted square‐planar coordination geometry. A π–π interaction is present between the phenyl rings of the PPh3 ligand and the terminal –PPh2 group of the PSP chelate. 相似文献
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Water‐Soluble Phospholo[3,2‐b]phosphole‐P,P′‐Dioxide‐Based Fluorescent Dyes with High Photostability
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Dr. Chenguang Wang Prof. Dr. Aiko Fukazawa Yoshiyuki Tanabe Naoto Inai Prof. Dr. Daisuke Yokogawa Prof. Dr. Shigehiro Yamaguchi 《化学:亚洲杂志》2018,13(12):1616-1624
We recently reported that fluorescent dye PB430, which consisted of a 2‐phenyl‐substituted benzophosphole P‐oxide skeleton that was reinforced by a methylene bridge, showed pronounced photostability and, thus, high utility for applications in super‐resolution stimulated emission depletion (STED) microscopy. Herein, we replaced the methylene bridge with another P=O group to 1) investigate the role of the bridging moieties; and 2) further modulate the fluorescence properties of this skeleton. We synthesized a series of phospholo[3,2‐b]phosphole‐based dyes—trans‐PO‐PB430, cis‐PO‐PB430, and trans‐PO‐PB460—all of which showed sufficient water solubility. Moreover, trans‐PO‐PB430 and trans‐PO‐PB460 exhibited intense green and orange fluorescence, respectively, and a high photostability that was comparable to that of PB430. In contrast, cis‐PO‐PB430 underwent rapid photobleaching upon continuous photoirradiation, which demonstrated the importance of steric shielding of the polycyclic skeleton by the substituents on the bridging moieties. The fluorescence properties of these dyes were insensitive to concentration, pH value, and polarity changes of the environment in solution. In addition, even in the solid state, these dyes showed strong green to orange emissions. These results demonstrate the potential utility of trans‐PO‐PB430 and trans‐PO‐PB460 as highly photostable fluorescent dyes. 相似文献
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The new phosphides HfM′P (M′ = Fe, Co, Ni) have been synthesized by arc melting of HfP and the corresponding 3 d metal, and subsequent annealing at 1400°C. The lattice constants vary from a = 6.247(2) Å, b = 3.7177(6) Å, c = 7.137(2) Å, V = 165.74(8) Å3 for HfFeP, a = 6.295(3) Å, b = 3.668(2) Å, c = 7.175(4) Å, V = 165.7(2) Å3 for HfCoP to a = 6.240(3) Å, b = 3.716(2) Å, c = 7.135(2) Å, V = 165.4(2) Å3 (HfNiP) in the orthorhombic space group Pnma. Although ZrNiP occurs only in the Ni2In structure type, all three Hf phosphides crystallize in the Co2Si structure type, isotypic to ZrFeP and ZrCoP. The structural differences between HfNiP and ZrNiP can be explained by the preference of Hf for structures with more metal-metal bonds rather than by size effects. 相似文献
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The phosphorus-carbon bond in various P-triphenylmethyl-substituted phosphorus compounds of simple as well as more complex structure can be cleaved selectively by treatment with Lewis acids, halogens (or halogen transfer agents), and hydrogen halides. The course of the reaction can be followed easily by NMR spectroscopy, in certain cases this P–C-bond cleavage can be used as a synthetic principle for phosphorus difluorohalides, F2PHal (Hal = Cl, Br, F). In the presence of the appropiate structural elements, cleavage of P–P-bonds or rearrangements are observed. 相似文献
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Aleksandra Wiśniewska Katarzyna Baranowska Rafał Grubba Eberhard Matern Jerzy Pikies Prof. Dr. 《无机化学与普通化学杂志》2010,636(8):1549-1556
tBu2P–PLi–PtBu2 · 2THF reacts with [(R3P)2MCl2] (M = Pt, Pd, Ni; R3P = Et3P, pTol3P, Ph2EtP, iPr3P) to yield isomers of [(1,2‐η‐tBu2P=P–PtBu2)M(PR3)Cl], in which the tBu2P–P–PtBu2 ligand adopts the arrangement of a side‐on bonded 1,1‐di‐tert‐butyl‐2‐(di‐tert‐butylphosphanyl)diphosphenium cation. tBu2P–PLi–P(NEt2)2 · 2THF reacts with [(R3P)2MCl2] but does not form complexes with a tBu2P–P–P(NEt2)2 moiety, however, splitting of a P–P(NEt2)2 bond of the parent triphosphane takes place. 相似文献
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P,P′-(2,5-Dimethoxy-3,6-dimethyl-2,5-dioxo-2λ5,5λ5-[1,4,2,5]dioxadiphosphinane-2,5-diyl)-bis-phosphonic acid tetramethylester The title compound 1 is formed by reaction of the corresponding phosphonic acid 2 and orthoformicacidmethylester as a mixture of four stereoisomeres. The RRSS isomer was separated. It crystallizes in the triclinic space group P ?1 with a = 649.2 pm, b = 976.1 pm, c = 1 571.7 pm, α = 80.9°, β = 88.1°, γ = 78.6° and Z = 2. The 31P and 13C NMR spectra (4 and 5 spin systems) are discussed. 相似文献
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P,P′-(2,5-Dihydroxy-3,6-dimethyl-2,5-dioxo-2λ5,5λ5-[1,4,2,5]dioxadiphosphinane-2,5-diyl)-bis-phosphonic Acid The tetrahydrate 1 of the title compound crystallizes in the monoclinic space group P21/c with a = 845.8, b = 1 098, c = 981.7 pm, β = 113.02° and Z = 2. The anions of the oxonium compound (H3O+ · H2O)2(C4H10O12P42?) are layered by hydrogen bridges. The 1H, 13C and 31P NMR spectra (4 and 5 spin systems) are discussed. 相似文献
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Nigel T. Lucas Clem E. Powell Mark G. Humphrey 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(9):e392-e393
In the cation of the title complex, cis,cis,cis‐[Ru(η2‐O2CMe)(dppe)2]PF6·2MeOH [dppe is 1,2‐bis(diphenylphosphino)ethane, C26H24P2], the Ru atom is in a pseudo‐octahedral coordination environment with two chelating dppe ligands and one chelating acetate ligand. Intra‐phosphine and intra‐acetate bond lengths and angles are unexceptional. Deviations from idealized octahedral coordination angles at ruthenium [O—Ru—O 59.43 (8)° and P—Ru—P 103.19 (2)°] presumably derive from constraints imposed by the chelate rings. The Ru—P distances for the mutually trans P‐donor atoms [2.3785 (6) Å] are significantly longer than those for the Ru—P linkages trans to the acetate ligand [2.3074 (6) Å]. The Ru1, C1 and C2 atoms lie on a twofold axis, and atom P3 of the anion lies on an inversion centre. 相似文献