621110-83-6

Basic information

• Product Name: {2,4,6-tris[bis(trimethylsilyl)methyl]phenyl}dichlorophosphine
• Synonyms: {2,4,6-tris[bis(trimethylsilyl)methyl]phenyl}dichlorophosphine
• CAS NO: 621110-83-6
• Molecular Weight: 654.158
• Mol File: 621110-83-6.mol

Chemical Properties

• CAS DataBase Reference: {2,4,6-tris[bis(trimethylsilyl)methyl]phenyl}dichlorophosphine(CAS DataBase Reference)
• NIST Chemistry Reference: {2,4,6-tris[bis(trimethylsilyl)methyl]phenyl}dichlorophosphine(621110-83-6)
• EPA Substance Registry System: {2,4,6-tris[bis(trimethylsilyl)methyl]phenyl}dichlorophosphine(621110-83-6)

Safety Data

• Hazardous Substances Data: 621110-83-6(Hazardous Substances Data)

Upstream product

• 115160-05-9 1-bromo-2,4,6-tris[bis(trimethylsilyl)methyl]benzene 
• 125444-10-2 {2,4,6-tris-(bis-(trimethylsilyl)methyl)phenyl}lithium 

Downstream Products

• 404568-13-4 {2,4,6-tris[bis(trimethylsilyl)methyl]phenyl}(dimethyl)phosphine 
• 621110-74-5 bis(2,4,6-tris[bis(trimethylsilyl)methyl]phenyl)diphosphene 

Relevant articles and documents

Synthesis and reactions of new diphosphenes bearing extremely bulky substituents

In this paper, we present the synthesis of new diphosphenes TbtP=PTbt and BbtP=PBbt having extremely bulky substituants, 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (Tbt) and 2,6-bis[bis(trimethylsilyl)methyl]-4-[tris(trimethylsilyl)methyl]phenyl groups (Bbt). Their x-ray crystallographic analysis revealed their unique structures in the solid state. Furthermore, the configurations of these extremely overcrowded diphosphenes, TbtP=PTbt and BbtP=PBbt, are twisted in different ways in spite of the close structural similarity between Tbt and Bbt groups. DFT calculations were performed to estimate the energy difference between the two configurations of diphosphenes. In addition, their structures and physical properties were compared with those of their heavier congeners, distibenes (ArSb=SbAr, Ar = Tbt and Bbt) and dibismuthenes (ArBi=BiAr, Ar = Tbt and Bbt) having the same substituents. Although the reactivities of the extremely hindered diphosphenes might be considerably suppressed owing to the severe steric congestion, it was found that they can react with elemental sulfur and selenium to give the corresponding thia- and selenadiphosphirane derivatives, respectively, in addition to the previously reported diphosphenes. Copyright

Synthesis and properties of the first disulfur and diselenium complexes of platinum

The reactions of overcrowded platinum(0) complexes [Pt{P(Ar)Me 2}2] (Ar = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (Tbt), 2,6-bis[bis-(trimethylsilyl)methyl]-4-[tris(trimethylsilyl)methyl]phenyl (Bbt)) with elemental sulfur and selenium resulted in the formation of the first platinum disulfur and diselenium complexes, [Pt(S2){P(Ar)Me 2}2] (4a (Ar = Tbt), 4b (Ar = Bbt) and [Pt(Se 2){P(Ar)Me2}2] (5a (Ar = Tbt), 5b (Ar = Bbt)) respectively. The x-ray crystallographic analyses of 4b and 56 showed a novel three-membered PtE2 (E = S, Se) ring structure with a square planar geometry around the platinum center. The oxidation of 4b and 5b with an equimolar amount of m-chloroperbenzoic acid or tert-butyl hydroperoxide in dichloromethane yielded the corresponding disulfur and diselenium monoxide complexes [Pt(E2O){P(Bbt)Me2}2] (6 (E = S), 7 (E = Se)). The further reactions of 6 and 7 with an excess of oxidants gave the corresponding O,S-coordinated thiosulfato complex [Pt(S2O 3){P(Bbt)Me2}2] (8) and the O,O-coordinated selenito complex [Pt(SeO3){P(Bbt)Me2}2] (11), respectively. The dynamic behavior in solution was revealed by the variable-temperature NMR spectroscopy for 4b, 5b, 8, and 11, which indicates the existence of the intramolecular CH...E (E = O, S, Se) interactions between the methine hydrogens of the o-bis(trimethylsilyl)methyl groups and the Pt-bonded chalcogen atoms.