89597-05-7

Basic information

• Product Name: DIMETHYLBIS(2,3,4,5-TETRAMETHYL-2,4-CYCLOPENTADIEN-1-YL)SILANE
• Synonyms: BIS(2,3,4,5-TETRAMETHYL-2,4-CYCLOPENTADIEN-1-YL)DIMETHYLSILANE;BIS-(2,3,4,5-TETRAMETHYL-2,4-CYCLOPENTADIENE-1-YL)-DIMETHYLSILANE;DIMETHYLBIS(2,3,4,5-TETRAMETHYL-2,4-CYCLOPENTADIEN-1-YL)SILANE;dimethylbis(2,3,4,5-tetramethyl-2,4-cyclopentadie;BIS(2,3,4,5-TETRAMETHYL-2,4-CYCLOPENTADIENE-1-YL)DIMETHYLSILANE, 95+%
• CAS NO: 89597-05-7
• Molecular Formula: C20H32Si
• Molecular Weight: 300.55
• Product Categories: Alkenes;Cyclic;Organic Building Blocks
• Mol File: 89597-05-7.mol
• Article Data: 2

Chemical Properties

• Melting Point: 65-68 °C(lit.)
• Boiling Point: 358°C at 760 mmHg
• Flash Point: 156.5°C
• Appearance: Yellow/Powder and Chunks
• Density: 0.91g/cm³
• Vapor Pressure: 5.41E-05mmHg at 25°C
• Refractive Index: 1.502
• Storage Temp.: Refrigerator (+4°C)
• CAS DataBase Reference: DIMETHYLBIS(2,3,4,5-TETRAMETHYL-2,4-CYCLOPENTADIEN-1-YL)SILANE(CAS DataBase Reference)
• NIST Chemistry Reference: DIMETHYLBIS(2,3,4,5-TETRAMETHYL-2,4-CYCLOPENTADIEN-1-YL)SILANE(89597-05-7)
• EPA Substance Registry System: DIMETHYLBIS(2,3,4,5-TETRAMETHYL-2,4-CYCLOPENTADIEN-1-YL)SILANE(89597-05-7)

Safety Data

• WGK Germany: 3
• Hazardous Substances Data: 89597-05-7(Hazardous Substances Data)

Usage

InChI:InChI=1/C20H32Si/c1-11-12(2)16(6)19(15(11)5)21(9,10)20-17(7)13(3)14(4)18(20)8/h19-20H,1-10H3

Upstream product

• 75-78-5 dimethylsilicon dichloride 
• 118799-36-3 bis{(dimethyl(2,3,4,5-tetramethyl-2,4-cyclopentadien-1-yl)silyl)tetramethyl-η5-cyclopentadienyl}lead 
• 118799-35-2 bis{(dimethyl(2,3,4,5-tetramethyl-2,4-cyclopentadien-1-yl)silyl)tetramethyl-η5-cyclopentadienyl}tin 
• 118799-34-1 bis{(dimethyl(2,3,4,5-tetramethyl-2,4-cyclopentadien-1-yl)silyl)tetramethyl-η5-cyclopentadienyl}germanium 
• 1493-13-6 trifluoromethanesulfonic acid 
• 4249-10-9 1,2,3,4-tetramethylcyclopenta-1,3-diene 

Downstream Products

• 100516-64-1 {(dimethylsilanediyl)bis(2,3,4,5-tetramethyl-h⁽⁵⁾-cyclopentadienyl)}zirconium dichloride 

Relevant articles and documents

Synthesis, crystal structures and some properties of dimethylsilylene-bridged ansa-permethyltitanocene [Ti(IV), (III) and (II)] complexes

Dimethylsilylene-bridged complexes Me2Si(C5Me4)2TiCl (2), Me2Si(C5Me4)2Ti[η2-C2(SiMe3)2] (3) and Me2Si(C5H4)2Ti[η2-C2(SiMe3)2] (4) have been prepared by the general methods which are known for obtaining of analogous non-bridged titanocene complexes. X-ray crystal structures of Me2Si(C5Me4)2TiCl2 (1), 2, and 3 reveal that the dihedral angle ? between the least-squares planes of cyclopentadienyl rings increases in the order 2 5HMe4)2Ti and (C5Me5)2Ti compounds shows that the value of ? increases in the series (C5Me5)2Ti 5HMe4)2Ti 2Si(C5Me4)2Ti, e.g. in the bis(trimethylsilyl)acetylene complexes from 41.1° for (C5Me5)2Ti[η2-C2(SiMe3)2] (9) to 50.0° for (C5HMe4)2Ti[η2-C2(SiMe3)2] (8) and to 53.5° for 3. Compounds 3, 8 and 9 induce the head-to-tail dimerization of 1-hexyne with the selectivity of 72percent, 21percent and ca. 100percent respectively. The discrepancy between the selectivities and the values of ? for 3 and 8 is accounted for by a larger flexibility of the titanocene skeleton in 8, affording a larger space for a non-specific coordination of 1-hexyne. The effects of the μ-Me2Si group in 2 and 3 on some of their properties are compared with the effects of Me and H substituents in the non-ansa compounds with controversial results. For instance, the affinity of 2 to 2-methyltetrahydrofuran approaches that of (C5H2Me3)2TiCl whereas the shift of the v(C≡C) vibration in 3 indicates a stronger metal-acetylene bond than in 9.