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Dive into the research topics where Piet-Jan Sinnema is active.

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Featured researches published by Piet-Jan Sinnema.


Chemical Communications | 2004

Isolation and structural characterization of the first thermally robust and air stable Cr(4+) bent- metallocene complex

Piet-Jan Sinnema; Justin Nairn; Ralph Zehnder; Pamela J. Shapiro; Brendan Twamley; Alex Blumenfeld

The first thermally robust and air stable bent-sandwich chromocene complex with chromium in the +4 oxidation state has been isolated and fully characterized.


Organometallics | 2001

Calcium-Mediated Fulvene Couplings. 1. A Survey of 6,6-Dialkylfulvenes for the Formation of Bridged and Unbridged Calcocenes

Piet-Jan Sinnema; Pamela J. Shapiro; Britta Höhn; and Thomas E. Bitterwolf; Brendan Twamley


Organometallics | 2002

Calcium-mediated fulvene couplings. 2. Survey of 6-aryl- and 6-alkylfulvenes for their rac selectivity in the synthesis of ansa-calcocenes

Piet-Jan Sinnema; Britta Höhn; Robert L. Hubbard; Pamela J. Shapiro; Brendan Twamley; and Alexander Blumenfeld; Ashwani Vij


Journal of the American Chemical Society | 2002

Zwitterionic ring-borylated ansa-chromocene complexes.

Piet-Jan Sinnema; Pamela J. Shapiro; David Min Jin Foo; Brendan Twamley


Organometallics | 2002

Isolation of a stable ansa-chromocene(III) carbonyl cation and characterization of a transient, cationic ansa-chromocene(IV) carbonyl hydride

David M. Foo; Piet-Jan Sinnema; Brendan Twamley; Pamela J. Shapiro


Journal of Organometallic Chemistry | 2003

Calcium-mediated fulvene couplings. 3. Reductive coupling of guaiazulene with activated calcium to give a mixture of 8,6′ and 8,8′ (diguaiazulenide)calcium isomers. Thermal rearrangement of the 8,6′ isomer to the 8,8′ isomer and X-ray crystal structure of the 8,8′ isomer

Piet-Jan Sinnema; Pamela J. Shapiro; Britta Höhn; Brendan Twamley


Organometallics | 2006

A new, convenient method for labeling cyclopentadienyl ligands with deuterium

Philippe Perrotin; Piet-Jan Sinnema; Pamela J. Shapiro


Chemistry: A European Journal | 2007

Ring-borylated 15-electron and 17-electron ansa-chromocene complexes, their physical properties and molecular structures.

Pamela J. Shapiro; Piet-Jan Sinnema; Philippe Perrotin; Peter H. M. Budzelaar; Høgni Weihe; Brendan Twamley; Ralph Zehnder; Justin Nairn


Chemical Communications | 2004

Isolation and structural characterization of the first thermally robust and air stable Cr(4+) bent-metallocene complexElectronic supplementary information (ESI) available: details of synthesis and characterization for 4 and 5. See http://www.rsc.org/suppdata/cc/b3/b311352c/

Piet-Jan Sinnema; Justin Nairn; Ralph Zehnder; Pamela J. Shapiro; Brendan Twamley; Alex Blumenfeld


Journal of the American Chemical Society | 2004

Zwitterionic Ring-Borylated ansa-Chromocene Complexes [J. Am. Chem. Soc. 2002, 124, 10996−10997].

Piet-Jan Sinnema; Pamela J. Shapiro; and David Min Jin Foo; Brendan Twamley

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Ashwani Vij

Air Force Research Laboratory

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Høgni Weihe

University of Copenhagen

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