共查询到20条相似文献,搜索用时 5 毫秒
1.
The resulting salts of (H2bpp)MX4 · n H2O (M = Zn, X = Cl, n = 1, 1; M = Cd, X = Br, n = 0, 2; M = Hg, X = Cl, n = 1, 3; M = Cu, X = Cl, n = 0, 4; M = Cu, X = Br, n = 1, 5; M = Pt, X = Cl, n = 1, 6) were crystallized from the reaction mixture prepared by adding MX2 to the HX solution of 1,3-bis(4-pyridyl)propane (bpp), while the salt of colorless (H2bpp)SnCl6, 7, was crystallized from the reaction mixture prepared by adding SnCl2 to the HCl solution of bpp. Their structures have been determined by X-ray crystallography. All the compounds show supramolecular structures in the solid state by intermolecular hydrogen bondings and aromatic – interactions. The H2bpp2+ cations in these metal salts adopt the gauche–gauche and anti–anti conformations with different dihedral angles for the two pyridyl rings. 相似文献
2.
《Journal of Coordination Chemistry》2012,65(14):2500-2509
Three complexes, [Mn(bpp)4(H2O)2](ClO4)2?·?1.5H2O (1), [Mn(bpp)3Br2]?·?2H2O (2), and [Mn(bpp)2(H2O)2](ClO4)?·?I?·?H2O?·?bpp (3) (bpp?=?1,3-bis(4-pyridyl)propane), were synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 is mononuclear where M(II) is coordinated to a monodentate TT-bpp, three monodentate TG-bpp, and two water molecules. Complex 2 possesses a single-stranded helical chain formed from MnN4Br2 octahedra by a single TT-bpp, with pendant monodentate TG-bpp ligands. Complex 3 consists of a ribbon-type double-stranded chain formed from MnN4O2 octahedra by double TG-bpp ligands. 2-D supramolecular architectures of 1–3 are formed by hydrogen bonds. The fluorescence of the three complexes comes from the π*–π transition of the ligand. 相似文献
3.
天然产物1,3-二-(2-羟基-4-甲氧基苯基)丙烷和1,3-二-(2,4-二羟基苯基)丙烷的合成 总被引:2,自引:0,他引:2
1,3-二-(2-羟基-4-甲氧基苯基)丙烷(1)和1,3-二-(2,4-二羟基苯基)丙烷(2)是从菊叶薯蓣(Dioscorea composita Hemsl.)分离出来的天然产物, 以间苯二酚为起始原料, 分别经甲酰化和乙酰化得到2,4-二羟基苯甲醛和2,4-二羟基苯乙酮, 然后经选择性地甲基化、甲氧甲基化、羟醛缩合、还原、脱保护等步骤完成了上述两种天然产物的首次全合成. 产物通过1H NMR, IR, MS进行了结构确证. 相似文献
4.
5.
Kiyoshi Fujisawa Takuya Nemoto Yui Morishima Daniel B. Leznoff 《Molecules (Basel, Switzerland)》2021,26(4)
Coinage metal(I)···metal(I) interactions are widely of interest in fields such as supramolecular assembly and unique luminescent properties, etc. Only two types of polynuclear silver(I) pyrazolato complexes have been reported, however, and no detailed spectroscopic characterizations have been reported. An unexpected synthetic method yielded a polynuclear silver(I) complex [Ag(μ-L1Clpz)]n (L1Clpz− = 4-chloride-3,5-diisopropyl-1-pyrazolate anion) by the reaction of {[Ag(μ-L1Clpz)]3}2 with (nBu4N)[Ag(CN)2]. The obtained structure was compared with the known hexanuclear silver(I) complex {[Ag(μ-L1Clpz)]3}2. The Ag···Ag distances in [Ag(μ-L1Clpz)]n are slightly shorter than twice Bondi’s van der Waals radius, indicating some Ag···Ag argentophilic interactions. Two Ag–N distances in [Ag(μ-L1Clpz)]n were found: 2.0760(13) and 2.0716(13) Å, and their N–Ag–N bond angles of 180.00(7)° and 179.83(5)° indicate that each silver(I) ion is coordinated by two pyrazolyl nitrogen atoms with an almost linear coordination. Every five pyrazoles point in the same direction to form a 1-D zig-zag structure. Some spectroscopic properties of [Ag(μ-L1Clpz)]n in the solid-state are different from those of {[Ag(μ-L1Clpz)]3}2 (especially in the absorption and emission spectra), presumably attributable to this zig-zag structure having longer but differently arranged intramolecular Ag···Ag interactions of 3.39171(17) Å. This result clearly demonstrates the different physicochemical properties in the solid-state between 1-D coordination polymer and metalacyclic trinuclear (hexanuclear) or tetranuclear silver(I) pyrazolate complexes. 相似文献
6.
7.
A new coordination complex [Cd2(ip)2(bpp)]n(1, H2 ip = isophthalic acid, bpp = 1,3-bis-(4-pyridyl) propane) has been synthesized and structurally characterized. Crystal data for the title complex are as follows: triclinic system, space group P1 with a = 9.6724(6), b = 10.2243(6), c = 14.8205(9) ?, α = 88.927(5), β = 71.664(6), γ = 75.767(5)°, V = 1345.79(14) ?3, Mr = 751.29, Z = 2, F(000) = 740, Dc = 1.854 g/cm3, μ(Mo Kα) = 1.636 mm-1, R = 0.0259 and w R = 0.0623 for 4754 observed reflections with I 2σ(I). X-ray structure analysis reveals that complex 1 holds a 3D architecture based on α-Po primitive cubic units with the [Cd4(COO)8] units treated as 6-connected nodes. Solid-state properties for 1, such as infrared spectroscopy, elemental analyses, thermal stability and luminescent property, have also been investigated. 相似文献
8.
Borovikov Yu. Ya. Dul'nev P. G. Ponomarenko S. P. Sivachek T. E. 《Russian Journal of General Chemistry》2001,71(5):789-794
Polycrystalline complexes of MnCl2 with N-oxides of pyridine, 2-picoline, and 2,6-lutidine contain a molecule of strongly retained crystallization water; two types of the labile networks of hydrogen bonds are formed on the crystal surface. Under solar radiation the long-lived F-centers are formed in the crystals, imparting a specific color to the compounds. The thermal motion of MnCl2 complexes with lutidine N-oxide in the unit cells can be described as gas-like motion. At low temperatures the electrical conductivity is predominantly maintained by protons, whereas at high temperatures another mechanism of conductivity arises. 相似文献
9.
Yusuf Erdogdu M. Tahir Güllüoğlu Mustafa Kurt Şenay Yurdakul 《Journal of inclusion phenomena and macrocyclic chemistry》2009,64(3-4):341-355
We report the results of detailed experimental and theoretical studies on the molecular structure and vibrational spectra of metal(II) halide complexes of 1,3-bis(4-pyridyl)propane [M(N2C13H14)X2, where M represents Zn or Hg, and X represents Cl, Br, or I]. The FT–infrared spectra (FT-IR) and FT-Raman spectra of the metal complexes of the 1,3-bis(4-pyridyl)propane molecule in the powder form were recorded between the 400–4000 and 5–3500 cm?1 regions, respectively. The molecular geometry and vibrational frequencies of the metal complexes of 1,3-bis(4-pyridyl)propane in the ground state were calculated using density functional theory (B3LYP functional) with LANL2DZ and SDD as basis sets. The total energy distributions (TED) among the symmetry coordinates of the normal modes were computed for the low-energy structure of the molecules. Complete vibrational assignments based on the calculated TED values are given. 相似文献
10.
11.
V. V. Mezheritskii L. G. Minyaeva Yu. I. Ryabukhin G. N. Dorofeenko 《Chemistry of Heterocyclic Compounds》1977,13(3):260-264
A method is proposed for the synthesis of 2-(-dimethylaminovinyl)-4-oxo-1,3-benzoxazinium salts and dimethyl (4-oxo-3H-1,3-benzoxazine-2-methylene) sulfonium salts by condensation of 2-alkylbenzoxazinonium salts with dimethylformamide and dimethyl sulfoxide.Translated from Khimiya Geterotsiklichesikikh Soedinenii, No. 3, pp. 328–331, March, 1977. 相似文献
12.
13.
lntroductionThedrivingforcet0pursueresearchonph0t0refractivep0Iymersc0mesfr0mb0thfundamentaIinterestsandpracticalexpectati0ns.Ithasbeenkn0wnthatph0t0refractivematerialsaremultifuncti0nalmateriaIswhichcombinetheelectr0-0ptic(EO)effectandphotoconductivitytomanifestanewpropertyfphotorefractivity'.Sincel990,photorefractivestudieshavebeenextendedintoorganicmaterialsfbothd0pedorganiccrystalsandpolymericmaterials=-'.Organicphotorefractivematerialsexhibitreasonablylargeelectr0-opticresp0nseandalower… 相似文献
14.
D. B. Rubinov T. A. Zheldakova R. A. Zheldakova I. L. Rubinova A. V. Baranovski F. A. Lakhvich 《Russian Journal of General Chemistry》2012,82(1):122-130
Condensation of 2-propanoyl-, 2-butanoyl-, and 2-pentanoylcyclohexane-1,3-diones with aromatic aldehydes in the presence of
secondary amines (diethylamine, pyrrolidine, morpholine, piperidine, and hexamethyleneimine) leads to the formation of the
corresponding 2-[1-(dialkylamino)-2-alkyl-3-aryl-2-propylidene]cyclohexane-1,3-diones and derivatives of 4H-chromen-4,5(6H)-dione. A primary screening of some of the resulting enamino derivatives for fungicidal activity has been performed. 相似文献
15.
Reaction of 2-acylcyclohexane-1,3-diones with 5- and 6-membered cyclic azomethines (3,4-dihydro-2H-pyrrole and 2,3,4,5-tetrahydropyridine) furnished derivatives of 2,3,3a;,4,8,9-hexahydropyrrolo[1,2-a]quinoline-5,6(1H,5aH)-dione and 3,4,4a,5,9,10-hexahydro-1H-pyrido[1,2-a]quinoline-6,7(2H,8H)-dione respectively. In reaction with 7-membered 3,4,5,6-tetrahydro-2H-azepine we failed to isolate polycyclic nitrogen-containing products. 相似文献
16.
The reaction of MnCl2 with TMP (TMP = Trimethyl phosphate) in THF (THF = tetrahydroforan), led to the coordination polymer [Mn2(μ3‐DMP)2(μ‐DMP)2]n (1) (DMP = dimethyl phosphate). This complex was characterized by elemental analysis, IR spectroscopy and single‐crystal structure of 1 . Crystal data for 1 at ?173 °C: triclinic, space group , a = 9.7071(11), b = 10.4482(11), c = 10.6242(11) Å, α = 88.892(2)°, β = 80.829(2)°, γ = 87.572(2)°, Z = 2, R1 = 0.0441. 相似文献
17.
18.
E. J. Gao X. Y. Xu M. C. Zhu H. L. Yan H. Fu H. Wang L. Zhan Q. Yao M. Y. Li M. P. Jiang 《Russian Journal of Coordination Chemistry》2014,40(8):583-587
The complex [Cd(Bpp)3Cl2] n · 2H2O (Bpp = 1,3-bis(4-pyridyl)propane) has been synthesized and characterized by elementary analysis, IR spectrum and singel-crystal X-ray diffraction. The crystal belongs to monoclinic system, space group C2/c with the crystal cell parameters of a = 31.05(3), b = 17.556(13), c = 16.281(13) Åβ = 121.402(7)°, V = 7574(10) Å3, and Z = 8. The compound has formed a 1D surface shape structure through these coordinate modes with the ligand. The 2D layers are further aggregated by hydrogen bonding with octameric subunits. 相似文献
19.
A one‐pot synthesis of Hantzsch pyridines was achieved through NH4I‐promoted condensation of 1,3‐dicarbonyl compounds with DMSO and NH4OAc, in which the C4 of the pyridine rings was derived from DMSO and the nitrogen atom resulted from NH4OAc and NH4I. The target product could be obtained in moderate to excellent yields. 相似文献
20.
Summary Coordination compounds formed by the interaction of 1,3-bis(4-pyridyl)propane (DPP) with some divalent metal halides and pseudohalides have been prepared and characterized by magnetic susceptibilities, electronic and i.r. spectral measurements down to 200 cm–1 in the solid state. The i.r. spectra indicate that DPP acts mostly as a bidentate bridging ligand in these complexes. Moreover, the two pyridyl rings which are nonplanar in uncoordinated DPP become coplanar upon coordination. Tentative stereo chemistries of the complexes have been suggested in the solid state. The ligand field parameters Dq, B, , and 2/1 have been calculated for the cobalt(II) and nickel(II) complexes and are consistent with the proposed stereo chemistries. 相似文献