Um die anderen Arten von Veröffentlichungen zu diesem Thema anzuzeigen, folgen Sie diesem Link: Organoplatinum compounds.

Zeitschriftenartikel zum Thema „Organoplatinum compounds“

Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an

Wählen Sie eine Art der Quelle aus:

Machen Sie sich mit Top-37 Zeitschriftenartikel für die Forschung zum Thema "Organoplatinum compounds" bekannt.

Neben jedem Werk im Literaturverzeichnis ist die Option "Zur Bibliographie hinzufügen" verfügbar. Nutzen Sie sie, wird Ihre bibliographische Angabe des gewählten Werkes nach der nötigen Zitierweise (APA, MLA, Harvard, Chicago, Vancouver usw.) automatisch gestaltet.

Sie können auch den vollen Text der wissenschaftlichen Publikation im PDF-Format herunterladen und eine Online-Annotation der Arbeit lesen, wenn die relevanten Parameter in den Metadaten verfügbar sind.

Sehen Sie die Zeitschriftenartikel für verschiedene Spezialgebieten durch und erstellen Sie Ihre Bibliographie auf korrekte Weise.

1

Massa, W., G. Baum, B. S. Seo, and J. Lorberth. "Organoplatinum compounds." Journal of Organometallic Chemistry 352, no. 3 (September 1988): 415–20. http://dx.doi.org/10.1016/0022-328x(88)83130-9.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
2

Donath, H., E. V. Avtomonov, I. Sarraje, K. H. von Dahlen, M. El-Essawi, J. Lorberth, and B. S. Seo. "Organoplatinum compounds VII." Journal of Organometallic Chemistry 559, no. 1-2 (May 1998): 191–96. http://dx.doi.org/10.1016/s0022-328x(98)00481-1.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
3

Benn, Reinhard, Rolf-Dieter Reinhardt, and Anna Rufińska. "195Pt NMR of organoplatinum compounds." Journal of Organometallic Chemistry 282, no. 2 (March 1985): 291–95. http://dx.doi.org/10.1016/0022-328x(85)87180-1.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
4

Deolka, Shubham, Orestes Rivada-Wheelaghan, Sandra L. Aristizábal, Robert R. Fayzullin, Shrinwantu Pal, Kyoko Nozaki, Eugene Khaskin, and Julia R. Khusnutdinova. "Metal–metal cooperative bond activation by heterobimetallic alkyl, aryl, and acetylide PtII/CuI complexes." Chemical Science 11, no. 21 (2020): 5494–502. http://dx.doi.org/10.1039/d0sc00646g.

Der volle Inhalt der Quelle
Annotation:
The selective formation of heterobimetallic Pt<sup>II</sup>/Cu<sup>I</sup> complexes demonstrates how facile bond activation processes can be achieved by altering the reactivity of common organoplatinum compounds through their interaction with another metal center.
APA, Harvard, Vancouver, ISO und andere Zitierweisen
5

Mahato, Dibyendu, Rahla Naghma, Mohammad Jane Alam, Shabbir Ahmad, and Bobby Antony. "Electron impact ionisation cross section for organoplatinum compounds." Molecular Physics 114, no. 21 (August 24, 2016): 3104–11. http://dx.doi.org/10.1080/00268976.2016.1219408.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
6

Nagashima, Hideo, Yoshiyuki Kato, Hirofumi Yamaguchi, Eiji Kimura, Teruhiko Kawanishi, Masanao Kato, Yahachi Saito, Masaaki Haga, and Kenji Itoh. "Synthesis and Reactions of Organoplatinum Compounds of C60, C60Ptn." Chemistry Letters 23, no. 7 (July 1994): 1207–10. http://dx.doi.org/10.1246/cl.1994.1207.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
7

Melnik, Milan, Ondrej Sprusansky, Clive Eduard Holloway, and Peter Mikus. "Platinum organometallic compounds: classification and analysis of crystallographic and structural data. Monomeric Pt compounds with PtC2AB, PtA2BC and PtABCD compositions." Reviews in Inorganic Chemistry 32, no. 2-4 (December 1, 2012): 111–80. http://dx.doi.org/10.1515/revic-2012-0008.

Der volle Inhalt der Quelle
Annotation:
AbstractThis review covers almost 350 four-coordinated monomeric organoplatinum complexes with PtC2AB, PtA2BC and PtABCD compositions, and there is wide variability of chromophores. The most common ligands in addition to the C donor are PPh3 and chlorine. Platinum(II) is found only in a square-planar environment involving cis- as well as trans-configurations with a different degree of distortion, especially when bi- or terdentate ligands are present. The trans-effect decreases in the order of the atoms in which the effect dominates, H&gt;C&gt;P&gt;Si&gt;S. There are at least two types of isome
APA, Harvard, Vancouver, ISO und andere Zitierweisen
8

Melník, Milan, Peter Mikuš, and Clive Eduard Holloway. "Platinum organometallic compounds: classification and analysis of crystallographic and structural data of monomeric five and higher coordinated." Reviews in Inorganic Chemistry 33, no. 1 (May 1, 2013): 13–103. http://dx.doi.org/10.1515/revic-2013-0001.

Der volle Inhalt der Quelle
Annotation:
AbstractFour hundred and twenty monomeric organoplatinum compounds, in which platinum atoms are five- and higher coordinated, are analyzed. The platinum atoms are found in the oxidation states +2, +3 and +4. The Pt(II) compounds by far prevail. There are wide varieties of the inner coordination spheres about the platinum centers. The Pt(II) compounds are five-coordinated (trigonal bipyramidal and square pyramidal), six-coordinated (different degrees of distortion), seven-coordinated (pentagonal bipyramidal, piano stool) and sandwiched (PtC10). The Pt(III) compound is square-planar. The Pt(IV)
APA, Harvard, Vancouver, ISO und andere Zitierweisen
9

Hubbert, Christoph, Marcus Breunig, Kristen J. Carroll, Frank Rominger, and A. Stephen K. Hashmi. "Simple Synthesis of New Mixed Isocyanide-NHC-Platinum(II) Complexes and Their Catalytic Activity." Australian Journal of Chemistry 67, no. 3 (2014): 469. http://dx.doi.org/10.1071/ch13546.

Der volle Inhalt der Quelle
Annotation:
Using the new modular and convergent approach to isocyanide-N-hetrocyclic carbene-platinum(ii) complexes, eight new compounds have been synthesised. For three of these, detailed structural data could be obtained by X-ray crystal structure analyses. This new family of organoplatinum complexes is catalytically active for hydrosilylation reactions; styrene and phenylacetylene could be used as substrates; triethylsilane and 1,1,1,3,5,5,5-heptamethyltrisiloxane could be used as reagents. With some of the new platinum pre-catalysts, excellent regioselectivities of up to 98 : 2 could be obtained, and
APA, Harvard, Vancouver, ISO und andere Zitierweisen
10

Noguchi, Kishie, Takashi Tamura, Hidetaka Yuge, and Takeshi Ken Miyamoto. "Linkage isomerism of organoplatinum(II) compounds coordinated by two 1,3-dimethylbarbiturate anions." Acta Crystallographica Section C Crystal Structure Communications 56, no. 2 (February 15, 2000): 171–73. http://dx.doi.org/10.1107/s0108270199014109.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
11

Kolonial Prodjosantoso, Anti. "Preparation and Characterization of Chloride-Free Alumina-Supported Platinum Catalysts." Oriental Journal of Chemistry 34, no. 4 (July 31, 2018): 2068–73. http://dx.doi.org/10.13005/ojc/3404046.

Der volle Inhalt der Quelle
Annotation:
Supported precious metal catalysts are extensively used as efficient catalysts. This kind of catalysts, particularly chloride-free catalysts, sintesized using organoplatinum compounds as precursors has attracted immense research interest compared to their parent metals due to their unique physico-chemical properties. The main objective of this research is to prepare and characterize the chloride-free alumina-supported platinum catalysts. An organometallic compound of ammonium bisoxalatoplatinate(II) hydrate was used to prepare unsupported and alumina supported platinum catalysts. A series meth
APA, Harvard, Vancouver, ISO und andere Zitierweisen
12

Singh, Khushwant, Ankit Gangrade, Achintya Jana, Biman B. Mandal, and Neeladri Das. "Design, Synthesis, Characterization, and Antiproliferative Activity of Organoplatinum Compounds Bearing a 1,2,3-Triazole Ring." ACS Omega 4, no. 1 (January 10, 2019): 835–41. http://dx.doi.org/10.1021/acsomega.8b02849.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
13

Klein, Axel, Steffen Hasenzahl, and Wolfgang Kaim. "EPR study of electron transfer and group transfer in organoplatinum(II) and (IV) compounds †." Journal of the Chemical Society, Perkin Transactions 2, no. 12 (1997): 2573–78. http://dx.doi.org/10.1039/a702466e.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
14

Sharutin, V. V., and A. V. Rybakova. "Organoplatinum Compounds Containing at Least Two Platinum–Carbon Bonds: Synthesis, Structure, and Practical Applications." Reviews and Advances in Chemistry 13, no. 2 (June 2023): 67–110. http://dx.doi.org/10.1134/s2634827623700216.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
15

Moustafa, Mohamed E., Paul D. Boyle, and Richard J. Puddephatt. "Photoswitchable organoplatinum complexes containing an azobenzene derivative of 3,6-di(2-pyridyl)pyridazine." Canadian Journal of Chemistry 92, no. 8 (August 2014): 706–15. http://dx.doi.org/10.1139/cjc-2013-0588.

Der volle Inhalt der Quelle
Annotation:
The new, unsymmetrical azobenzene-tagged ligand 4-(4-azobenzene)-3,6-di(2-pyridyl)pyridazine, adpp, forms complexes with platinum(II) and platinum(IV), which exist as a mixture of geometrical isomers. The complexes are characterized primarily by their NMR spectra, while the structures of the ligand and its complexes [PtMe2(adpp)], [PtBrMe2(CH2C6H4-4-t-Bu)(adpp)], and [PtBrMe2(CH2C6H3-3,5-t-Bu2)(adpp)] have been structurally characterized. In solution, the compounds undergo easy photochemical trans−cis switching of the azobenzene group, with subsequent slow thermal isomerization back to the mor
APA, Harvard, Vancouver, ISO und andere Zitierweisen
16

Moriuchi, Toshiyuki, Yuki Sakamoto, Shunichi Noguchi, Takashi Fujiwara, Shigehisa Akine, Tatsuya Nabeshima, and Toshikazu Hirao. "Design and controlled emission properties of bioorganometallic compounds composed of uracils and organoplatinum(ii) moieties." Dalton Transactions 41, no. 28 (2012): 8524. http://dx.doi.org/10.1039/c2dt30533j.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
17

Howell, B. A., E. W. Walles, and R. Rashidianfar. "Noncovalent complexes of water-soluble polymers and organoplatinum compounds as potential time-release antitumor agents." Makromolekulare Chemie. Macromolecular Symposia 19, no. 1 (June 1988): 329–39. http://dx.doi.org/10.1002/masy.19880190126.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
18

Raven, William, Thomas Joschko, Irmgard Kalf, and Ulli Englert. "Hydrogenversusfluorine: effects on molecular structure and intermolecular interactions in a platinum isocyanate complex." Acta Crystallographica Section C Structural Chemistry 72, no. 3 (February 13, 2016): 184–88. http://dx.doi.org/10.1107/s2053229616002382.

Der volle Inhalt der Quelle
Annotation:
At the molecular level, the enantiomerically pure square-planar organoplatinum complex (SP-4-4)-(R)-[2-(1-aminoethyl)-5-fluorophenyl-κ2C1,N][(R)-1-(4-fluorophenyl)ethylamine-κN](isocyanato-κN)platinum(II), [Pt(C8H9FN)(NCO)(C8H10FN)], and its congener without fluorine substituents on the aryl rings adopt the same structure within error. The similarities between the compounds extend to the most relevant intermolecular interactions,i.e.N—H...O and N—H...N hydrogen bonds link neighbouring molecules into chains along the shortest lattice parameter in each structure. Differences between the crystal
APA, Harvard, Vancouver, ISO und andere Zitierweisen
19

Anderson, Craig M., Margarita Crespo, Michael C. Jennings, Alan J. Lough, George Ferguson, and Richard J. Puddephatt. "Competition between intramolecular oxidative addition and ortho metalation in organoplatinum(II) compounds: activation of aryl-halogen bonds." Organometallics 10, no. 8 (August 1991): 2672–79. http://dx.doi.org/10.1021/om00054a031.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
20

Saha, Manik Lal, Xuzhou Yan, and Peter J. Stang. "Photophysical Properties of Organoplatinum(II) Compounds and Derived Self-Assembled Metallacycles and Metallacages: Fluorescence and its Applications." Accounts of Chemical Research 49, no. 11 (October 13, 2016): 2527–39. http://dx.doi.org/10.1021/acs.accounts.6b00416.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
21

Yamago, Shigeru, Eiichi Kayahara та Takahiro Iwamoto. "Organoplatinum-Mediated Synthesis of Cyclic π-Conjugated Molecules: Towards a New Era of Three-Dimensional Aromatic Compounds". Chemical Record 14, № 1 (лютий 2014): 84–100. http://dx.doi.org/10.1002/tcr.201300035.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
22

Yamago, Shigeru, Eiichi Kayahara та Takahiro Iwamoto. "ChemInform Abstract: Organoplatinum-Mediated Synthesis of Cyclic π-Conjugated Molecules: Towards a New Era of Three-Dimensional Aromatic Compounds". ChemInform 45, № 20 (28 квітня 2014): no. http://dx.doi.org/10.1002/chin.201420267.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
23

Janzen, Michael C., Michael C. Jennings, and Richard J. Puddephatt. "Self-assembly using stannylplatinum(IV) halide complexes as ligands for organotin halides." Canadian Journal of Chemistry 80, no. 11 (November 1, 2002): 1451–57. http://dx.doi.org/10.1139/v02-093.

Der volle Inhalt der Quelle
Annotation:
The possibility of forming extended structures by self-association using transition metal halides as donors to organotin acceptors has been investigated. The stannylplatinum(IV) complex [PtClMe2(SnMe2Cl)(bu2bpy)] forms a 1:1 adduct [PtClMe2(SnMe2Cl)(bu2bpy)]·Me2SnCl2 with Me2SnCl2 in which the organoplatinum complex acts as a donor to the organotin halide. Similarly, [PtClMe2(SnMeCl2)(bu2bpy)] forms adducts [PtClMe2(SnMeCl2)(bu2bpy)]·MeSnCl3 or [PtClMe2(SnMeCl2)(bu2bpy)]·Me2SnCl2, and [{PtClMe2(bu2bpy)}2(µ-SnCl2)] forms [{PtClMe2(bu2bpy)}2(µ-SnCl2)]·Me2SnCl2. Structure determinations on select
APA, Harvard, Vancouver, ISO und andere Zitierweisen
24

Ebert, K. H., W. Massa, H. Donath, J. Lorberth, B. S. Seo, and E. Herdtweck. "Organoplatinum compounds: VI. Trimethylplatinum thiomethylate and trimethylplatinum iodide. The crystal structures of [(CH3)3PtS(CH3)]4 and [(CH3)3PtI]4·0.5CH3I." Journal of Organometallic Chemistry 559, no. 1-2 (May 1998): 203–7. http://dx.doi.org/10.1016/s0022-328x(98)00414-8.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
25

Klein, Axel, Steffen Hasenzahl, Wolfgang Kaim та Jan Fiedler. "On the Question of Mixed-Valent States in Ligand-Bridged Dinuclear Organoplatinum Compounds [RkPt(μ-L)PtRk]n,k= 2 or 4†". Organometallics 17, № 16 (серпень 1998): 3532–38. http://dx.doi.org/10.1021/om980107j.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
26

Bryndza, Henry E., Peter J. Domaille, Wilson Tam, Lawrence K. Fong, Rocco A. Paciello, and John E. Bercaw. "Comparison of metal-hydrogen, -oxygen, -nitrogen and -carbon bond strengths and evaluation of functional group additivity principles for organoruthenium and organoplatinum compounds." Polyhedron 7, no. 16-17 (January 1988): 1441–52. http://dx.doi.org/10.1016/s0277-5387(00)81773-8.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
27

Huang, Mei-Han, Yan-Ming Huang, and Sheng-Nan Wu. "The Inhibition by Oxaliplatin, a Platinum-Based Anti-Neoplastic Agent, of the Activity of Intermediate-Conductance Ca2+-Activated K+ Channels in Human Glioma Cells." Cellular Physiology and Biochemistry 37, no. 4 (2015): 1390–406. http://dx.doi.org/10.1159/000430404.

Der volle Inhalt der Quelle
Annotation:
Oxaliplatin (OXAL) is a third-generation organoplatinum which is effective against advanced cancer cells including glioma cells. How this agent and other related compounds interacts with ion channels in glioma cells is poorly understood. OXAL (100 µM) suppressed the amplitude of whole-cell K+ currents (IK); and, either DCEBIO or ionomycin significantly reversed OXAL-mediated inhibition of IK in human 13-06-MG glioma cells. In OXAL-treated cells, TRAM-34 did not suppress IK amplitude in these cells. The intermediate-conductance Ca2+-activated K+ (IKCa) channels subject to activation by DCEBIO a
APA, Harvard, Vancouver, ISO und andere Zitierweisen
28

Bryndza, Henry E., Lawrence K. Fong, Rocco A. Paciello, Wilson Tam, and John E. Bercaw. "Relative metal-hydrogen, -oxygen, -nitrogen, and -carbon bond strengths for organoruthenium and organoplatinum compounds; equilibrium studies of Cp*(PMe3)2RuX and (DPPE)MePtX systems." Journal of the American Chemical Society 109, no. 5 (March 1987): 1444–56. http://dx.doi.org/10.1021/ja00239a026.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
29

Wouters, Jacqueline M. A., Rene A. Klein, Cornelis J. Elsevier, Martin C. Zoutberg, and Casper H. Stam. "Insertion of isocyanide into (.sigma.-allenyl)platinum(II) and -palladium(II) compounds. Synthesis and mechanism of formation of new organoplatinum compounds containing a .sigma.-bonded vinylketenimine ligand. X-ray crystal structure of [PtBr{C(CMe2)(CH:C:NBu-tert)}(PPh3)2]." Organometallics 12, no. 10 (October 1993): 3864–72. http://dx.doi.org/10.1021/om00034a019.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
30

Whitesides, George M., Marifaith Hackett, Robert L. Brainard, Jean Paul P. M. Lavalleye, Alan F. Sowinski, Alan N. Izumi, Stephen S. Moore, Duncan W. Brown, and Erin M. Staudt. "Suppression of unwanted heterogeneous platinum(0)-catalyzed reactions by poisoning with mercury(0) in systems involving competing homogeneous reactions of soluble organoplatinum compounds: thermal decomposition of bis(triethylphosphine)-3,3,4,4-tetramethylplatinacyclopentane." Organometallics 4, no. 10 (October 1985): 1819–30. http://dx.doi.org/10.1021/om00129a023.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
31

Van Beek, Johannus A. M., Gerard Van Koten, Wilberth J. J. Smeets, and Anthony L. Spek. "Model for the initial stage in the oxidative addition of I2 to organoplatinum(II) compounds. X-ray structure of square-pyramidal [PtIII{C6H3(CH2NMe2)2-o,o'}(.eta.1-I2)] containing a linear Pt-I-I arrangement." Journal of the American Chemical Society 108, no. 16 (August 1986): 5010–11. http://dx.doi.org/10.1021/ja00276a053.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
32

Chen, Li‐Jun, Xin Wu, Alexander M. Gilchrist, and Philip A. Gale. "Organoplatinum Compounds as Anion‐Tuneable Uphill Hydroxide Transporters." Angewandte Chemie, March 11, 2022. http://dx.doi.org/10.1002/ange.202116355.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
33

Chen, Li‐Jun, Xin Wu, Alexander M. Gilchrist, and Philip A. Gale. "Organoplatinum Compounds as Anion‐Tuneable Uphill Hydroxide Transporters." Angewandte Chemie International Edition, March 11, 2022. http://dx.doi.org/10.1002/anie.202116355.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
34

Bhavsar, Rakesh, Yogesh Thakar, Minaxi Vinodkumar, and Chetan Limbachiya. "Electron impact ionisation and other molecular processes for organoplatinum compounds." Molecular Physics, April 29, 2022. http://dx.doi.org/10.1080/00268976.2022.2070086.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
35

VAN BEEK, J. A. M., G. VAN KOTEN, W. J. J. SMEETS, and A. L. SPEK. "ChemInform Abstract: Model for the Initial Stage in the Oxidative Addition of I2 to Organoplatinum (II) Compounds." Chemischer Informationsdienst 17, no. 50 (December 16, 1986). http://dx.doi.org/10.1002/chin.198650305.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
36

BRYNDZA, H. E., P. J. DOMAILLE, W. TAM, L. K. FONG, R. A. PACIELLO, and J. E. BERCAW. "ChemInform Abstract: Comparison of Metal-Hydrogen, -Oxygen, -Nitrogen and -Carbon Bond Strengths and Evaluation of Functional Group Additivity Principles for Organoruthenium and Organoplatinum Compounds." ChemInform 20, no. 4 (January 24, 1989). http://dx.doi.org/10.1002/chin.198904098.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
37

BRYNDZA, H. E., L. K. FONG, R. A. PACIELLO, W. TAM, and J. E. BERCAW. "ChemInform Abstract: Relative Metal-Hydrogen, -Oxygen, -Nitrogen, and -Carbon Bond Strengths for Organoruthenium and Organoplatinum Compounds; Equilibrium Studies of Cp*(PMe3)2RuX and (DPPE)MePtX Systems." ChemInform 18, no. 28 (July 14, 1987). http://dx.doi.org/10.1002/chin.198728091.

Der volle Inhalt der Quelle
APA, Harvard, Vancouver, ISO und andere Zitierweisen
Wir bieten Rabatte auf alle Premium-Pläne für Autoren, deren Werke in thematische Literatursammlungen aufgenommen wurden. Kontaktieren Sie uns, um einen einzigartigen Promo-Code zu erhalten!