Production of a boraphosphene (RB:PR') in the vapor phase by thermolysis of a sterically encumbered diphosphadiboretane

Preparation and Characterization of P2BCh Ring Systems (Ch=S, Se) and Their Reactivity with N‐Heterocyclic Carbenes

“…4S Me : P(1)ÀC (1)1 .867(3), P(1)ÀC (25)1 .852(3), P(1)ÀS (1) 2.0186(15), C(1)-P(1)-C(25) 97.01 (14), C(1)-P(1)-S(1) 111.62 (11), C(25)-P(1) <-S(1)1 00.48 (12). 8Se:C(1)À P(2) 1.840 (6), P(2)ÀP (1) 2.201(2), P(1)ÀC (25)1 .863(6), P(1)-B(1) 1.952 (7), B(1)À N(1) 1.393 (8), B(1)ÀSe (1) 2.007(7), P(2)ÀSe (1) 2.2492(18),P(2)ÀAu (1) 2.2344 (17), Au(1)ÀCl (1) 2.2978(17), C(1)-P(2)-Au(1)114.09 (19),C (1)-P(2)-P(1)106.43 (19), C(1)-P(2)-Se(1) 114.8(2), P(2)-P(1)-C(25)1 12.66 (18), P(2)-P(1)-B(1) 89.0(2), P(1)-B(1)-N(1) 137.1(5), P(1)-B(1)-Se(1) 96.7(3),B (1)-Se(1)-P(2) 86.3(2), Se(1)-P(2)-P(1) 83.33 (7).…”

“…Solvents for Nuclear Magnetic Resonance (NMR) spectroscopy (CDCl 3 , C 6 D 6 ,a nd THF-d 8 )w ere stored in the glovebox over 4 molecular sieves. NMR spectra were recorded on aV arian INOVA4 00 MHz ( 1 H 400.09 MHz, 31 19 FNMR spectroscopy were referenced externally to phosphoric acid, trimethyl borate, and trifluorotoluene, respectively.Mass spectrometry was recorded in house in positive-and negative-ion modes using electrospray ionization Micromass LCT spectrometer. Melting or decomposition points were determined by flame-sealing the sample in capillaries and heating using aG allenkamp variable heater.E lemental analysis was performed at the University of Montreal and is reported as an average of two samples weighed under air and combusted immediate thereafter.…”

Phosphaborenes: Accessible Reagents for the Synthesis of C−C/P−B Isosteres

“…[1] Suggestively,t he mass spectra of two diphosphadiboretanes bearing bulky substituents have been reported to have parent molecular-ion peaks corresponding to [RP = BR] + ions. [9] Furthermore,d iphosphadiboretane 1 was noted by Arif et al to have ap articularly long PÀB bond distance of 1.96 (2) . [9a] Intrigued, we employed DFT calculations (M062X/Def2SVPP) [10] to examine the relative energies of 1 and its corresponding monomeric phosphaborene, 2 (Scheme 2).…”

Phosphaborenes: Accessible Reagents for the Synthesis of C−C/P−B Isosteres

“…Furthermore, diphosphadiboretane 1 was noted by Arif et al. to have a particularly long P−B bond distance of 1.96(2) Å . Intrigued, we employed DFT calculations (M062X/Def2SVPP) to examine the relative energies of 1 and its corresponding monomeric phosphaborene, 2 (Scheme ).…”