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  • Phosphatidylcholine  (3)
  • X-ray structure determination  (2)
  • structure determination  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Reutilization of phosphatidylcholine analogues by the pulmonary surfactant system - The lack of specificity
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Lipids and Lipid Metabolism 793 (1984), S. 300-309 
    Details
    ISSN: 0005-2760
    Keywords: Lung surfactant ; Phosphatidylcholine ; Phospholipid analog
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0005-2760(84)90333-3
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  • 2
    Electronic Resource
    Electronic Resource
    Changes in the amount of lung and airway phosphatidylcholine in 0.5-12.5-day-old rabbits
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Lipids and Lipid Metabolism 664 (1981), S. 182-187 
    Details
    ISSN: 0005-2760
    Keywords: (Rabbit lung) ; Development ; Phosphatidylcholine ; Surfactant phosphatidylcholine
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0005-2760(81)90040-0
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  • 3
    Electronic Resource
    Electronic Resource
    Route of incorporation of alveolar palmitate and choline into surfactant phosphatidylcholine in rabbits
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Lipids and Lipid Metabolism 752 (1983), S. 178-181 
    Details
    ISSN: 0005-2760
    Keywords: (Rabbit) ; Lung surfactant ; Phosphatidylcholine ; Precursor incorporation
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0005-2760(83)90246-1
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  • 4
    Electronic Resource
    Electronic Resource
    Protonenlagen bei Kaliumtetraamidozinkat, K2Zn(NH2)4Professor Welf Bronger zum 65. Geburtstag gewidmet (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1103-1107 
    Details
    ISSN: 0044-2313
    Keywords: Potassium tetraamido zincate ; X-ray structure determination ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Positions of the Protons in Potassium Tetraamidozincate, K2Zn(NH2)4X-ray single crystal data for K2Zn(NH2)4 allowed the determination of the so far unknown positions of the protons: P1, Z = 2, a = 6.730(1) Å, b = 7.438(1) Å, c = 8.019(2) Å, α = 72.03(2)°, β = 84.45(2)°, γ = 63.82(1)°, Z(F0) with (F0)2 ≥ 3σ(F0)2 = 2166, Z(parameters) = 96, R/RW = 0.032/0.039.In the structure of K2Zn(NH2)2 the amide ions are nearly hexagonal close packed. One layer of octahedral holes parallel to (010) is fully occupied by potassium atoms and zinc is in an ordered way in a quarter of the tetrahedral holes of the next layer. The orientation of the protons of the amide ions is characteristic for this type of structure (filled up CdI2 type).
    Notes: Die bisher unbekannten Protonenlagen bei K2Zn(NH2)4 wurden röntgenographisch über Einkristalldaten bestimmt: P1, Z = 2, a = 6,730(1) Å, b = 7,438(1) Å, c = 8,019(2) Å, α = 72,03(2)°, β = 84,45(2)°, γ = 63,82(1)°, Z(F0) mit (F0)2 ≥ 3σ(F0)2 = 2166, Z(Parameter) = 96, R/RW = 0,032/0,039.Die Amidionen bilden das Motiv einer hexagonal dichtesten Kugelpackung. Darin sind in Ebenen parallel (010) abwechselnd alle Oktaederlücken durch Kalium oder geordnet 1/4 der Tetraederlücken durch Zink besetzt. Die Orientierung der Protonen an den Amidionen ist für diesen Strukturtyp (aufgefüllter CdI2-Typ) charakteristisch.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230716
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  • 5
    Electronic Resource
    Electronic Resource
    Strukturchemische Verwandtschaft von Kaliumhexahydroxoscandat(III), K3[Sc(OH)6] mit den isotypen Hydroxometallaten Rb3[Sc(OH)6], K3[Cr(OH)6] und Rb3[Cr(OH)6]Professor Rudolf Hoppe zum 70. Geburtstage gewidmet (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 616 (1992), S. 71-78 
    Details
    ISSN: 0044-2313
    Keywords: Potassium hexahydroxoscandate ; rubidium hexahydroxoscandate ; rubidium hexahydroxochromate ; structure determination ; crystal chemistry ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structural Relationship of Potassium Hexahydroxoscandate(III), K3[Sc(OH)6] with the Isotypic Hydroxometallates Rb3[Sc(OH)6], K3[Cr(OH)6], and Rb3[Cr(OH)6]Ternary hydroxides M3I}MIII(OH)6{ with MI = K, Rb and MIII = Sc, Cr were obtained in the same way as K3[Cr(OH)6] [1] from alkali metal amides and d-metal nitrates by a comproportionation reaction of amide and nitrate ions in supercritical ammonia to elementary nitrogen and hydroxide ions at 523 K and 3 ≤ p(NH3) ≤ 6 kbar within 1 to 3 months. Their structures were determined by single crystal x-ray methods inclusive the positions of the hydrogen atoms. The ratio of size of r(MI)/r(MIII) is related to the symmetry of these hydroxometallates. Structural relationships between K3[Sc(OH)6] and Rb3[Sc(OH)6], K3(Cr(OH)6], Rb3[Cr(OH)6]) and K4[CdCl6] [4] are discussed.
    Notes: Ternäre Hydroxide M3I{MIII(OH)6}mit MI = K, Rb und MIII = Sc, Cr wurden analog zu K3[Cr(OH)6] [1] aus Alkalimetallamiden und d-Metallnitraten durch Komproportionierung von Amid- und Nitrationen zu elementarem Stickstoff und Hydroxidionen in überkritischem Ammoniak bei 523 K und 3 ≤ p(NH3) ≤ 6 kbar innerhalb von 1 bis 3 Monaten dargestellt. Die Atomanordnungen der Verbindungen wurden einschließlich der H-Positionen röntgenographisch an Einkristallen bestimmt. Das Größenverhältnis r(MI)/r(MIII) korreliert mit der Symmetrie dieser Verbindungen. Strukturchemische Beziehungen von K3[Sc(OH)6 zu Rb3[Sc(OH)6], K3[Cr(OH)6], Rb3[Cr(OH)6] zu K4[CdCl6] [4] werden diskutiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926161012
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  • 6
    Electronic Resource
    Electronic Resource
    Synthese und Struktur von Caesiumdiamidodioxophosphat, CsPO2(NH2)2Professor Joachim Strähle zum 60. Geburtstag gewidmet (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 849-852 
    Details
    ISSN: 0044-2313
    Keywords: Cesium Diamidodioxophosphate ; synthesis ; X-ray structure determination ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Structure of a Cesium Diamidodioxophosphate, CsPO2(NH2)2Colourless crystals of CsPO2(NH2)2 with the shape of platelets were obtained by the reaction of P3N5 with CsNH2 and CsOH · 3H2O in a molar ratio of 2:3:3 in supercritical ammonia at 400°C and p(NH3) = 6 kbar in a high-pressure autoclave within 10 days. The X-ray structure determination was successful including the positions of hydrogen.CsPO2(NH2)2: P43212 (No. 96), a = 5.630(1) Å, c = 15.320(3) Å, Z = 4, R1/Rw = 0.025/0.057 N(Fo2 〉 2σ(Fo2)) = 1309, N(Var.) = 36.P as the centres of tetrahedra - [PO2(NH2)2]- - form together with Cs the motif of a distorted NaCl type. This arrangement contains a three-dimensional network of hydrogen bridge bonds N-H … O and N-H … N.
    Notes: Farblose Kristalle von CsPO2(NH2)2 mit plättchenförmigem Habitus entstehen bei der Umsetzung von P3N5 mit CsNH2 und CsOH · 3H2O im molaren Verhältnis 2:3:3 in überkritischem Ammoniak bei 400°C und p(NH3) = 6 kbar in einem Hochdruckautoklav innerhalb von 10 Tagen. Die Struktur wurde röntgenographisch einschließlich der H-Lagen geklärt.CsPO2(NH2)2: P43212 (Nr. 96), a = 5,630(1) Å, c = 15,320(3) Å, Z = 4, R1/Rw = 0,025/0,057 N(Fo2 〉 2σ(Fo2)) = 1309, N(Var.) = 36.P als Schwerpunkte von Tetraedern - [PO2(NH2)2]- - bildet zusammen mit Cs das Motiv eines verzerrten NaCl-Typs. Zwischen den Tetraedern liegt ein dreidimensionales Netz, aus N-H … O- und N-H … N-Wasserstoff-Brückenbindungen vor.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.199762301134
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  • 7
    Electronic Resource
    Electronic Resource
    Darstellung und Kristallstruktur von Calciumimid, CaNH (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 2079-2082 
    Details
    ISSN: 0044-2313
    Keywords: Calcium imide CaNH ; preparation ; single-crystals ; structure determination ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of Calcium Imide, CaNHSingle-crystals of calcium imide were obtained for the first time by the reaction of a mixture of calcium amide with sodium amide at 850°C in an autoclave for salt melts. After cooling the autoclave to room temperature the crystals are embedded in solid Na which was extracted by liquid ammonia. The structure of calcium imide was determined from single-crystal diffractometer data:space group Fm3m, Z = 4, a = 5.143(1) Å, R/Rw = 0.032/0.028 mit N(Fº2 ≤ 3σ(Fº2)) = 26, N(Var.) = 5.Ca and N atoms are arranged in the motif of the NaCl structure type. The hydrogen atoms of the imide groups are disordered within the Ca octahedra, and they occupy a six fold split position.
    Notes: Kristalle von Calciumimid wurden durch Aufheizen eines Gemenges von Calcium- und Natriumamid in einem Autoklav für Salzschmelzen auf 850°C zum ersten Mal erhalten. Nach Abkühlen des Autoklavs sind die Kristalle in festem Na eingebettet, das mit flüssigem NH3 extrahiert wurde. Die Struktur von CaNH wurde röntgenographisch aus Einkristall-Diffraktometerdaten bestimmt:Raumgruppentyp Fm3m, Z = 4, a = 5,143(1) Å, R/Rw = 0,032/0,028 mit N(Fº2 ≤ 3σ(Fº2)) = 26, N(Var.) = 5.Ca- und N-Atome sind nach dem Motiv des NaCl-Strukturtyps angeordnet. Die Wasserstoffatome der Imidgruppen sind fehlgeordnet und besetzen in den Oktaedern von Ca eine Splitlage mit sechs Aufenthaltsmaxima.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966221214
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