Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 46 (1990), S. 1119-1121 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 49 (1993), S. 1932-1934 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 3 (1991), S. 503-505 
    ISSN: 0899-0042
    Keywords: racemisation of an S-enantiomeric Schiff base ligand ; potassium isocyanato-{N-salicylidene-(RS)-alaninato}cuprate(II) ; EPR spectrum ; basalcrystallographic data ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Copper(II) N-salicylidene-(S)-alaninate trihydrate reacting as the S-enantiomeric parent compound with KOCN in hot diluted methanol yielded by slow crystallisation from the cooled reaction mixture (in the course of 1 day) the racemic product K[Cu{sal-(RS)-ala}(NCO)]. The parameters of the axial type EPR spectrum in X-band region and the LF band position in the electronic spectrum are typical of an axially distorted square pyramidal coordination of the Cu(II) atom in this complex. The spectral properties of the complex cuprate prepared and its basal crystallographic data are consistent with those of the earlier studied15 K2[Cu2{sal-(RS)-ala}2(μ-NCO)2] synthetized by using [Cu{sal-(RS)-ala}(H2O)].H2O as the racemic parent complex in the reaction mixture with KOCN.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 409 (1974), S. 273-284 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation, Magnetic and Spectral Properties of Acetato- and Arylcarboxylatocopper (II) Complexes with antipyrineAcetato- and arylcarboxylatocopper(II) complexes of the type CoX2(Apy) as well as the m-cresotmatocopper(II) complex of the type Cu(m-Cres)2(Apy)2 were prepared (X and Apy see “Inhaltsubersicht”). Their magnetic susceptibilities at various temperatures and their electronic and ESR spectra were measured. The results indicate that the complexes of the type CuX2(Apy) have binuclear bridged structures with exchange interaction between both Cu2+ ions.The complex Cu(m-cres)2(Apy)2 is magnetically dilute and evidently exhibits a distorted octahedral structure. The reasons of the stabilisation of binuclear structures in case of aryl-carboxylatocopper(II) complexes through the coordination of antipyrine molecules were discussed.
    Notes: Acetato- und Arylcarboxylato-kupfer(II)-Komplexe der Zusammensetzung CuX2(Apy) sowie ein m-Kresotinato-kupfer(II)-Komplex der Zusammensetzung Cu(m-Kres)2(Apy)2 wurden dargestellt (X = Acetat-, Benzoat-, Salicylat-, o-, m- oder p-Kresotination; Apy = Antipyrin). Ihre magnetischen Suszeptibilitäten bei verschiedenen Temperaturen und ihre Elektronen- und ESR-Spektren wurden gemessen. Die Ergebnisse zeigen, daß alle Komplexe der Zusammensetzung CuX2(Apy) Zweikernbrückenstrukturen mit einer Austauschwechselwirkung zwischen beiden Cu2+-Ionen bilden. Der Komplex Cu(m-Kres)2(Apy)2 ist magnetisch verdünnt und weist offenbar eine verzerrt oktaedrische Koordination auf. Die Ursachen der Stabilisierung der Zweikernstrukturen bei Arylcarboxylato-kupfer(II)-Komplexen durch die Koordination von Antipyrinmolekeln werden diskutiert.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Koordinationsgeometrien und kooperative Ordnungseffekte in Kupfer(II)-Komplexen mit Dianionen von dreizähnigen Schiffschen Basen. I. Kristall- und Molekülstruktur sowie EPR-Untersuchung von N-Salicylidenglycinato-2-Methylimidazol-Kupfer(II)N-Salicylidenglycinato-2-Methylimidazol-Kupfer(II)  -  [Cu(salgly)(2-MeIm)]  -  C13H13N3O3Cu  -  kristallisiert monoklin, Raumgruppe P21/c, a = 1 248,4, b = 1 157,3, c = 964,5 pm, β = 108,91°, Z = 4; Strukturbestimmung mit 1 504 beobachteten Reflexen, R = 5,8%. In der Molekülstruktur des Komplexes sind die CuII-Ionen von den O,N,O-Atomen des dreizähnigen salgly2⊖-Liganden und dem 3-N-Atom von 2-MeIm annähernd quadratisch umgeben. Die Koordinationspolyeder werden jeweils durch ein apikal koordiniertes O-Atom (Bindungsabstand 248 pm) der Carboxylgruppe eines Nachbarkomplexes zu quadratischen Pyramiden ergänzt, die in der Kristallstruktur parallel ausgerichtete Zickzackketten bilden. Die EPR-Parameter der Titelverbindung (g1c = 2,176, g2c = 2,146, g3c = 2.056) liefern eine quantitative Bestätigung für die leicht gestört antiferrodistortive Ordnung der Komplexmoleküle. Vom kooperativen gc-Tensor eines Einkristalls wurden aufgrund der Strukturdaten orthorhombische molekulare g-Komponenten erhalten. Sie wurden verfeinert, um eine noch bessere Übereinstimmung mit den EPR-Parametern einer Reihe vergleichbarer Kupfer(II)-Komplexe zu erzielen.
    Notes: N-Salicyclideneglycinato(2-methylimidazole)copper (II)  -  [Cu(salgly)(2-MeIm)]  -  C13H13N3O3Cu  -  crystallizes in the monoclinic space group P21/c, a = 1 248.4, b = 1 157.3, c = 964.5 pm, β = 108.91°, Z = 4; structure determination with 1 504 significant reflections, R = 0.058. The molecular stucture of the complex is characterized by an approximately square coordination of CuII with O, N, O atoms of the tridendate dianion salgly2⊖ and the 3-N atom of 2-MeIm. The coordination polyhedron is completed to square pyramid by an apically coordinated carboxyl oxygen atom (bond distance 248 pm) from the neighboring complex molecule, thus forming zigzag chains oriented on parallel lines in the crystal structure. The EPR parameters of the title compound (g1c = 2.176, g2c = 2.146, g3c = 2.056) confirm the slightly disturbed antiferrodistortive ordering of the complex molecules quantitatively. From the cooperative gc tensor of a single crystal and the structural data orthorhombic molecular g components were evaluated. They were refined, in order to achieve a still better agreement with the EPR parameters of a series of comparable copper(II) complexes.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...