Центральная Научная Библиотека УрО РАН

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   P 41


    Pentanuclear pivalate Ni(II) and Co(II) clusters: Modulation of molecular structures and magnetic properties // Journal of Molecular Structure. - 2003. - Vol. 656, № 1-3. - P207-224

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CLUSTER -- MAGNETIC PROPERTIES -- TRANSITION METAL
Аннотация: Reaction of nickel cluster Ni9(HOOCCMe3) 4(?4-OH)3(?3-OH) 3(?n-OOCCMe3)12 (1) or cobalt pivalate polymer [Co(OH)n(OOCCMe3)2-n] x (7) with bis[3,5-(dimethylpyrazolyl)]-1,2,4,5-tetrazine (3) in MeCN solution was found as a result in the formation of isostructural pentanuclear clusters of composition M5(?3-OH) 2(?-OOCCMe3)4(?-N,N?,N? -3,5-Me2C3HN2C2(O)N 4)4(MeCN)2 (M = Ni (4), Co (8)) with a planar spirane metal core. Reaction of cobalt complex 7 with 3 in benzene gives rise to a pentanuclear cluster Co5(?3-OH)2(?-OOCCMe 3)4(?-N,N?,N?-3,5-Me2C 3HN2C2(O)N4)4(C 5N2H8)2 (9), containing coordinated pyrazole molecules as terminating ligands instead of labile MeCN ligands in 8. The reaction of cluster 8 with 2,6-diaminopyridine (T = 85 °C) in MeCN results in the substitution of MeCN ligands and formation of a new cluster Co5(?3-OH)2(?-OOCCMe3) 4(?-N,N?,N?-3,5-Me2C3HN 2C2(O)N4)4(C5H 7N3)2 (10) with two 2,6-diaminopyridine ligands instead of MeCN molecules. The reactions of 4 and 8 with NiCl 2·6H2O in MeCN/EtOH solution (3: 1) give rise to isostructural ferromagnetic pentanuclear chloro-bridged clusters M 5(?3-OH)2(?-CI)2(? -OOCCMe3)2(?-N,N?,N?-3,5-Me 2C3HN2C2 (O)N4) 2(?-N,N?,N?,O-3,5-Me2C3HN 2C2(O)N4)2(MeCN)2 (M = Co (11), Ni (12)). The reaction of 8 with solid COCl2·6H 2O in MeCN results in new seven-nuclear ferromagnetic cluster CO 5(?3-OH)2(?-CI)2(? -OOCCMe3)2(?-N,N?,N?-3,5-Me 2C3HN2- C2(O)N4) 2(?-N,N?,N?,O-3,5-Me2C3HN 2C2(O)N4)2(MeCN) 2[Co(CH3CN)CI2]2 (13). The molecular structures of 4, 8, 9, 10, 12 and 13 established by X-ray diffraction studies and magnetic behavior of new nickel and cobalt pivalate clusters are discussed.

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   S 89


    Structures of Ni(II), Pd(II) and Cu(II) complexes with 1,2-bis(5,5,5-trifluoro-4-oxopent-2-en-2-amino)benzene [Electronic resource] / D. L. Chizhov, E. F. Khmara, P. A. Slepukhin, V. I. Filyakova, V. N. Charushin // Journal of Structural Chemistry. - 2010. - Vol. 51, № 2. - P288-295

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
Cu(II) COMPLEXES -- SYNTHESIS -- X-RAY CRYSTALLOGRAPHY ????
Аннотация: A new fluorine-containing tetradentate ligand 1,2-bis(5,5,5-trifluoro-4-oxopent-2-en-2-amino)benzene and its complexes with Ni(II), Pd(II) and Cu(II) are characterized by single crystal X-ray diffraction. It is found that the enaminoketone fragments of the ligand are identical in bond lengths and angles; they are almost planar, and make the angles of 51.3° to the plane of the benzene ring. The structures of Ni(II), Pd(II), and Cu(II) complexes are similar and have a saddle-shape configuration. The metal ions have square planar coordination and are located almost in the center of the N2O2 square. The average M-N bond lengths are longer than M-O ones by 0.014 A and 0.034 A for the Ni(II) and Cu(II) complexes respectively, while in the Pd(II) complex, M-O is longer than M-N by 0.029 A. The average chelate angles N-M-O in the complexes are: N-Ni-O 95.12°; N-Pd-O 95.68°; N-Cu-O 93.88

\\\\Expert2\\nbo\\Journal of Structural Chemistry\\2010, V. 51, N 2, p.288-295.pdf
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   P 49

    Pestov, A. V.
    First example of the planar rectangular 18-nuclear nickel(II) hydroxo complex with n-(2-pyridylmethyl)iminodipropionic acid [Electronic resource] / A. V. Pestov, Yu. G. Yatluk, P. A. Slepukhin // Russian Journal of Coordination Chemistry. - 2011. - Vol. 37, № 8. - P619-624. - Bibliogr. : p. 624 (15 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A planar rectangular cluster Ni(18) (I) was obtained from N-(2-pyridylmethyl)iminodipropionic acid (II). The crystal structure of complex I was determined by X-ray diffraction. Complex I is built from the octanuclear planar framework (III) of the nickel(II) hydroxo complex (Ni...Ni 2.976-3.092 ), four nickel chelates with the corresponding acid (IV), which are coplanar with the framework and are on both its sides (Ni...Ni, 2.938-3.188 ), four hydroxo complexes, and two mixed chloro chelates V), which are not coplanar with the framework (Ni...Ni, 3.141 and 3.181 ). In the chelate parts of complex I, the organic ligand is hexadentate because of bridging bonds; the coordination polyhedroLn of the metal center is a distorted square bipyramid (4 + 2)

\\\\Expert2\\nbo\\Russian Journal of Coordination Chemistry\\2011, v. 37, N. 8, p.619.pdf
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   S 98


    Synthesis of chiral ferrocenylazines. Negishi cross-coupling or S N H reactions? [Electronic resource] / A. A Musikhina, I. A. Utepova, N. S. Serebryakov, O. N. Chupakhin, V. N. Charushin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2013. - Vol.49, №8. - С. 1191-1194. - Bibliogr. : p. 1194 (28 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
SYNTHESIS -- CHIRAL FERROCENYLAZINES -- NEGISHI
Аннотация: Preparation of new hetaryl-containing planar chiral ferrocene by a nucleophilic substitution of hydrogen in azines was performed using a lithium derivative of (S)-ferrocenyl-p-tolylsulfoxide as s nucleophilic reagent

\\\\expert2\\NBO\\Russian Journal of Organic Chemistry\\2013, 49, (8), 1191-1194.pdf
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   T 44


    The synthesis of planar chiral ferrocenes and their use for an effective asymmetric catalysis / O. N. Chupakhin, I. A. Utepova, V. N. Charushin, A. A Musikhina, P. O. Serebrennikova // 18th European Symposium on Organic Chemistry ESOC-2013, Marseille, France, 7-12 July 2013 : book of abstracts. - Marseille, France, 2013. - С. 224

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
SYNTHESIS -- CHIRAL FERROCENES -- EFFECTIVE ASYMMETRIC CATALYSIS

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   T 98


    Two Approaches in the Synthesis of Planar Chiral Azinylferrocenes [Electronic resource] / I. A. Utepova, O. N. Chupakhin, P. O. Serebrennikova, A. A Musikhina, V. N. Charushin // Journal of Organic Chemistry. - 2014. - Vol. 79, № 18. - С. 8659-8667. - Bibliogr. : p. 8666-8667 (34 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CHIRAL AZINYLFERROCENES -- CROSS-COUPLING REACTION -- HALOGENATED AZINES
Аннотация: Two synthetic routes to the chiral azinylferrocenes (CAFs) 5 and 15, key intermediates for the synthesis of new enantiomerically enriched P,N-ligands, have been compared. The first approach is based on the palladium-catalyzed cross-coupling reaction of halogenated azines with organozinc derivatives of ferrocenes (the Negishi reaction). The second approach exploits a new synthetic methodology, which provides a shorter pathway, through the direct C–H functionalization of aromatics by the C–C coupling of halogen-free (hetero)arenes with lithium ferrocenes bearing stereogenic C and S atoms. The palladium complexes of P,N-ligands have been used as catalysts for the Tsuji–Trost reaction, which proceeds with high enantioselectivity to give allylic substitution products in good yields.

\\\\expert2\\nbo\\Journal of Organic Chemistry\\2014, v.79, p.8659.pdf
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   E 97


    Extended cavity pyrene-based iptycenes for the turn-off fluorescence detection of RDX and common nitroaromatic explosives / A. F. Khasanov [et al.] // New Journal of Chemistry. - 2017. - Vol. 41, № 6. - P2309-2320

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
PYRENE (CHEMICAL) -- FLUORESCENCE -- RDX (CYCLONITE)
Аннотация: Extended cavity pyrene-based iptycenes have been synthesized by using the Diels–Alder reaction between in situ generated dehydropyrenes and anthracene. The photophysical properties and the interaction of these iptycenes with nitro-explosive components were studied both in solution and in the solid state by using fluorescence spectroscopy and X-ray crystallography, respectively. Due to the presence of both the large iptycene cavity and the central pyrene core, an unprecedently high fluorescence-quenching response towards non-aromatic and non-planar 1,3,5-trinitroperhydro-1,3,5-triazine (RDX) has been observed both in solution (with an apparent Stern–Volmer constant value aKSV up to 1.53 × 103 M−1) and in the vapor phase (50–75% fluorescence quenching of the PU films doped with chemosensors). In the case of nitroaromatic explosives, nitrobenzene (NB), 2,4-DNT, TNT, and 2,4,6-trinitrophenol (TNP or picric acid, PA), pyrene-based iptycenes also demonstrate a good fluorescence-quenching response both in solutions (with apparent Stern–Volmer constant values aKSV = 0.4–8.0 × 103 M−1) and in the vapor phase (up to 90% fluorescence quenching of the PU films doped with chemosensors). The “sphere of action” fluorescence quenching model was suggested.

\\\\Expert2\\NBO\\New Journal of Chemistry\\2017 v.41 p.2309-2320.pdf
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   P 71


    Planar polycubane single-molecule magnet [NI6(pymeid)6NI12(OH)6(µ3OH)16CL2 (H2O)2]·38H2O: experiment and theory / Y. N. Shvachko, D. V. Starichenko, A. V. Korolev, A. V. Pestov, P. A. Slepukhin, D. W. Boukhvalov // Inorganica chimica acta. - 2018. - V 483. - P480-487

ББК 24
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Comprehensive experimental and theoretical study of atomic and magnetic structure of the 18-nuclei complex [Ni6(pymeid)6Ni12(OH)6(µ3-OH)16Cl2 (H2O)2] 38H2O (H2pymeid – N-(2-pyridyl)methyliminodipropionic acid) with rare polycubane planar architecture is reported. Magnetic moments of NiII ions (S = 1) in the sectional metal-oxygen Ni18 core are coupled ferro- and antiferromagnetically, so that the complex is a single-molecule magnet (SMM) with the total spin in the ground state S = 10, and the blocking temperature Tb = 14.3 K. The ac – susceptibility, χ’’, obeys the Arrhenius law with the effective barrier Ueff = 18.9 cm−1 (27.2 K). QTM regime is observed at T ≤ 8 K. Magnetic anisotropy is characterized by remanent magnetization M0 = 0.7 µB and coercive field Hc = 340 Oe. Electronic structure and values of the local moments and the exchange constants are calculated in the LDA + U DFT approach. Two complementary 3-nuclei cubane fragments are linked antiferromagnetically to the main 12-nuclei ferromagnetic core. The ligands moderate the exchange couplings in the adjacent cubanes by shifting respective 3d DOS peaks of peripheral Ni ions towards lower energies.

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   S 98


    Synthesis of a novel planar-chiral nido-carborane amino acid / A. A. Telegina, D. A. Gruzdev, G. L. Levit, V. P. Krasnov // Russian chemical bulletin. - 2021. - Vol. 70, № 3. - P539-544

ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CARBORANE -- PLANAR CHIRALITY -- AMINO ACID -- DEBORONATION
Аннотация: The deboronation of enantiomers of planar-chiral benzyl (3-formamido-1,2-dicarba-closo-dodecaboran-1-yl)acetate gave the individual (RP)- and (SP)-enantiomers (ee > 98%) of a new amino acid containing a nido-carborane fragment, (3-ammonio-7,8-dicarba-nido-undecaboran-7-yl)acetic acid. Chiral HPLC methods for the analysis of enantiomeric purity of this compound was developed.

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