facilitated expedient analysis of the samples. Students were able to directly apply Faraday's laws of electrolysis and mole relationships to the household product analysis. The PDMS cell can be used for other electrochemical experiments as well.' ASSOCIATED CONTENT b S Supporting Information Directions to make the miniature PDMS coulometry cell; detailed experimental procedure and calculations. This material is available via the Internet at http://pubs.acs.org.
Die Umsetzungen von MoNCl3 bzw. WNCl3 mit Lithium‐Diphenylamid in Tetrahydrofuran führen zu den monomeren Nitridokomplexen MN(NPh2)3 mit KZ = 4 an den Metallatomen. Bei Anwesenheit von Lithium‐n‐butyl reagiert LiNPh2 mit WNCl3 auch zu dem tetrameren, Wolfram(V) und Wolfram(VI) enthaltenden Nitridokomplex [W4N4(NPh2)6(OnC4H9)2]. Die Verbindungen werden durch ihre IR‐Spektren, zum Teil durch die 1H‐ und 13C‐Kernresonanzspektren sowie durch Röntgenstrukturanalysen charakterisiert.
MoN(NPh2)3: Raumgruppe P1, Z = 2, 4060 unabhängige beobachtete Reflexe, R = 3,1%. Gitterabmessungen bei 20°C: a = 956,2(4); b = 1015,9(2); c = 1598,1(3) pm; α = 79,06(2)°; β = 85,67(3)°; γ = 82,57(3)°. Die Verbindung bildet monomere Moleküle mit Bindungslängen MoN 163,4 pm und MoNPh2 von im Mittel 199,2 pm.
[W4N4(NPh2)6(OnC4H9)2]: Raumgruppe P21/n, Z = 2, 1903 beobachtete unabhängige Reflexe, R = 3,9%. Gitterabmessungen bei 19°C: a = 1 582,2(3); b = 1 182,4(2); c = 2 053,3(4) pm; β = 103,77(2)°. Die Verbindung bildet zentrosymmetrische Moleküle, deren zentrale W—W‐Hantel (Bindungslänge 253,5 pm) über die Nitridoliganden zweier WN2(NPh2)2‐Einheiten mit T‐förmiger Anordnung der N‐Atome verknüpft ist.
We have synthesized several metal xanthate complexes from metal salts and xanthate potassium salts. Powders of several of the materials were sorted and tested for their nonlinear optical properties. Cadmium xanthate demonstrated phase matchability for frequency doubling of 1.06 micron light and generated a very strong second harmonic signal.
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