149075-28-5

Basic information

• Product Name: 1,1,3,3-tetra-tert-butyl-1,3,2,4-diphosphadiboracyclobutane
• Synonyms: 1,1,3,3-tetra-tert-butyl-1,3,2,4-diphosphadiboracyclobutane
• CAS NO: 149075-28-5
• Molecular Weight: 316.063
• Mol File: 149075-28-5.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 1,1,3,3-tetra-tert-butyl-1,3,2,4-diphosphadiboracyclobutane(CAS DataBase Reference)
• NIST Chemistry Reference: 1,1,3,3-tetra-tert-butyl-1,3,2,4-diphosphadiboracyclobutane(149075-28-5)
• EPA Substance Registry System: 1,1,3,3-tetra-tert-butyl-1,3,2,4-diphosphadiboracyclobutane(149075-28-5)

Safety Data

• Hazardous Substances Data: 149075-28-5(Hazardous Substances Data)

Upstream product

• 14044-65-6 borane-THF 
• 149468-33-7 9-(di-tert-butylphosphanyl)-9-bora{3.3.1}bicyclononane 

Relevant articles and documents

Contributions to the Chemistry of Boron, 215. - Synthesis and Reactions of Monomeric Tetraorganyl-phosphanylboranes

The reaction of diorganyl-chloroboranes with lithium diorganyl- or lithium bis(trimethylsilyl)phosphides leads to the monomeric phosphanylboranes tBu2BPtBu2 (1), tBu2BP(SiMe3)2 (2), 9-BBNPtBu2 (3), 9-BBNP(SiMe3)2 (4), and Cy2BPtBu2 (5).These species were studied by NMR-spectroscopic methods.For further characterization reactions of the compounds 1, 3, and 5 have been investigated.Heating of 1 and 5 results in the formation of the dimeric phosphanylboranes tBu(H)BPtBu2 (8) and Cy(H)BPtBu2 (9) by dehydroboration.Dimers 8 and 9 are present as cis- and trans-isomers asconfirmed by X-ray structure analyses.The trans isomer of 9 shows a planar (BP)2 four-membered ring, whereas the ring of the cis-isomer of 8 is slightly folded.Furthermore, the reaction of 3 with 9H-9-BBN yields (μ-H)(μ-tBu2P)2 (14), whose bridged structure is proven by a crystal structure analysis.Oxidation of the phosphorus atom in 3 with sulfur leads to the S-boryl thiophosphinate tBu2(S)PS-9-BBN (16). Key Words: Phosphanylboranes, tetraorganyl/1,3,2,4-Diphosphadiboracyclobutane/Diboranes, μ-phosphanyl-/Thiophosphinate, S-boryl.