121097-72-1

Basic information

• Product Name: 2,4,6,8-tetra-tert-butyl-1,3,5,7-tetraphosphapentacyclo<4.2.0.0^2,5.0^3,8.0^4,7>octane
• Synonyms: 2,4,6,8-tetra-tert-butyl-1,3,5,7-tetraphosphapentacyclo<4.2.0.0^2,5.0^3,8.0^4,7>octane
• CAS NO: 121097-72-1
• Molecular Weight: 400.401
• Mol File: 121097-72-1.mol
• Article Data: 7

Chemical Properties

• CAS DataBase Reference: 2,4,6,8-tetra-tert-butyl-1,3,5,7-tetraphosphapentacyclo<4.2.0.0^2,5.0^3,8.0^4,7>octane(CAS DataBase Reference)
• NIST Chemistry Reference: 2,4,6,8-tetra-tert-butyl-1,3,5,7-tetraphosphapentacyclo<4.2.0.0^2,5.0^3,8.0^4,7>octane(121097-72-1)
• EPA Substance Registry System: 2,4,6,8-tetra-tert-butyl-1,3,5,7-tetraphosphapentacyclo<4.2.0.0^2,5.0^3,8.0^4,7>octane(121097-72-1)

Safety Data

• Hazardous Substances Data: 121097-72-1(Hazardous Substances Data)

Upstream product

• 109613-89-0 zirconocene 1,3-diphosphabicyclo[1.1.0]butane 
• 21907-22-2 diphenylantimony trichloride 
• 78129-68-7 2,2-dimethylpropylidynephosphine 
• 117972-60-8 tert-pentylphosphaacetylene 

Relevant articles and documents

Promotion of phosphaalkyne cyclooligomerisation by a Sb(V) to Sb(III) redox process

A high yield of the tetraphosphaladderene, anti-tetraphosphatricyclo[4.2.0. 02,5]octa-3,7-diene, is obtained from reaction of the zirconocene 1,3-diphosphabicyclo[1.1.0]butane with Ph2SbCl3 in THF or CH2Cl2. Exploration of the reaction pathway using density functional theory suggests that an envelope-type adduct of Ph2SbCl and 1,3-diphosphabicyclo[1.1.0]butane plays a pivotal role in the reaction. The zwitterionic character of this intermediate species allows it to act simultaneously as both an ene and an eneophile, and a symmetry-allowed bimolecular reaction leads to the tetraphosphaladderene species via a spirocyclic intermediate.

The metal-initiated cyclooligomerization of phospha-alkynes and its consequences [1]

1,3-Diphosphacyclobutadienes 4 are almost certainly intermediates in the conversion by hexachloroethane of phosphaalkyne dimer complexes 3 to the tetraphosphacubanes 5. We now describe trapping reactions of 4, generated in the same way, wilh phosphaalkyne 1 (→9), ynamines 10 (→13), and electron-poor alkynes 11 (→14). The cyclooligomerization of 1 initiated by t-Bu-N=VCl3·DME (15) leads to the azatetraphosphaquadricyclanes 20 while the reaction with the stronger Lewis acid t-Bu-N=VCl3 (21) furnishes the 1,3,5-triphosphabenzenes 23 in high selectivity.

Selektive Synthesen von 1,3-Diphosphacyclobutadien, Dewar-1,3,5-Triphosphabenzol, 1,3,5-Triphosphabenzol und 1,3,5,7-Tetraphosphabarrelen durch Cyclooligomerisierung von Phosphaalkinen

Keywords: Cyclooligomerisierungen, Hafniumverbindungen, Heterocyclen, Phosphaalkine, Phosphoverbindungen