497845-31-5Relevant academic research and scientific papers
(η6-[7]Heliphene)tricarbonylchromium via an Optimized Preparation of [7]Heliphene
Holmes, Daniel,Lee, Sang Yeul,Lotz, Sabine D.,Nguyen, Son C.,Schaller, Gaston R.,Schmidt-Radde, Rachel H.,Vollhardt, K. Peter C.
, p. 2038 - 2054 (2015/07/15)
Optimized procedures to [7]heliphene are described that allowed the synthesis of (η6-[7]heliphene)tricarbonylchromium and a preliminary exploration of its chemical behavior. DFT calculations provide structural and energetic information on this complex and its haptomeric isomers. Attempts to prepare the corresponding ([7]heliphene)chromium sandwich failed so far, but DFT evidence is presented to indicate that the target should be accessible.
Total syntheses of angular [7]-, [8]-, and [9]phenylene by triple cobalt-catalyzed cycloisomerization: Remarkably flexible heliphenes
Han, Sangdon,Anderson, D. Ryan,Bond, Andrew D.,Chu, Hiufung V.,Disch, Raymond L.,Holmes, Daniel,Schulman, Jerome M.,Teat, Simon J.,Vollhardt, K. Peter C.,Whitener, Glenn D.
, p. 3227 - 3230 (2007/10/03)
Six of the final cyclobutadiene rings in angular [8]phenylene and [9]phenylene (1) are closed in an unprecedented cobalt-catalyzed triple cyclization of appropriate nonaynes. These strained products are the largest known phenylenes and display unusual con
