2,4‐Di‐tert‐butyl‐1λ³,3λ³‐diphosphinines: Targeted Synthesis at Iron(0) Centers and Oxidative Release

Abstract

The bright yellow fruiting bodies of the yet-unidentified species of Faeolaschia (sp. 87129) were collected in Kolobo. Ethiopia, in 1991, and were used to establish the mycelial culture by means of spore replication. Culture conditions on a l0OL scale: HMP medium (yeast extract 4. malt extract 10, glucose 4 g1-I; pH 5.5). The fermentation was ended after five to seven days. A n g w . U i m i . h i t . Ed. Engl. 1995. 34, N o . 2 <&) VCH Verlugsgesellschufi mhH, 0-69451 Weinlieim, 1995

Substituent effect on low coordination phosphorus chemistry

“…1,3-Diphosphinine 7 (R 0 : tBu, R: H) has been synthesized first by Zenneck and coworkers [14] by a transition metal catalyzed cycloaddition reaction of tBuCP and acetylene. 7 (R@R 0 : tBu), the pertertiarybutylated system is not yet known.…”

Phospha‐Organic Chemistry: Panorama and Perspectives

“…[238] The coordination chemistry of phosphinines has been extensively reviewed. [239] Among diphosphinines, only the 1,3-isomers are stable, the first example being prepared by Zenneck et al [240] Only one 1,4-diphosphinine is known: [241] this is an unstable (CF 3 ) 4 -substituted molecule which behaves as a very reactive 1,4-diphosphadiene. [242] No 1,2-diphosphinine is known to date and a recent synthetic study has cast some doubt upon their existence.…”

The Structures and Energies of Phosphaalkyne Trimers, (HCP) 3

“…ZPE(HF/6-31G*)]. Only derivatives of B13 (2,4-di-tert-butyl-1,3-diphosphabenzene) [36] and B14 [2,3,5,6-tetrakis(tri-The least stable isomers, D235, which has two carbon atoms in the bridgehead positions 1 and 4, and D135, a derivative fluromethyl)-1,4-diphosphabenzene] [37] have been observed experimentally, but none of the thermodynamically most of which is experimentally known, [17] are only 6.8 kcal mol Ϫ1 higher in energy than D123. Geometric parameters stable isomer, B12.…”