Bis(1,5-cyclooctadiene)rhodium(I) tetrafluoroborate Chemical Properties

Melting point:

210 °C

Density 

0.42 g/cm3 (20℃)

storage temp. 

Inert atmosphere,Store in freezer, under -20°C

solubility 

Chloroform (Slightly), Methanol (Slightly)

form 

Powder

color 

Red

PH

7 (5g/l, H2O, 20℃)

Water Solubility 

insoluble

Sensitive 

Slightly air & moisture sensitive

Exposure limits

ACGIH: TWA 1 mg/m3
NIOSH: IDLH 100 mg/m3; TWA 0.1 mg/m3

InChI

InChI=1S/2C8H12.BF4.Rh/c2*1-2-4-6-8-7-5-3-1;2-1(3,4)5;/h2*1-2,7-8H,3-6H2;;/q;;-1;+1/b2*2-1-,8-7-;;

InChIKey

IEMMJJILGGBYNZ-GSLAGHMSSA-M

SMILES

[B-](F)(F)(F)F.C1CCC=CCCC=1.C1CCC=CCCC=1.[Rh+] |c:7,11,15,19|

CAS DataBase Reference

35138-22-8(CAS DataBase Reference)

Safety Information

Hazard Codes 

F,Xi

Risk Statements 

11-34

Safety Statements 

16-45-36/37/39-26

RIDADR 

UN 2921

WGK Germany 

2

Hazard Note 

Irritant

TSCA 

No

HazardClass 

8

PackingGroup 

III

HS Code 

28439000

Storage Class

4.1B - Flammable solid hazardous materials

Hazard Classifications

Acute Tox. 4 Oral
Eye Irrit. 2
Resp. Sens. 1
Skin Irrit. 2
Skin Sens. 1
STOT SE 3

MSDS

• Language:English Provider:ACROS
• Language:English Provider:ALFA

Bis(1,5-cyclooctadiene)rhodium(I) tetrafluoroborate Usage And Synthesis

Uses

1. Convenient catalyst precursor, for example, with (R,R)QuinoxP* for asymmetric alkylations and hydrogenations.
2. Catalyst precursor with chiral biaryl bisphosphine ligands for [2+2+2] enantioenriched cycloadditions. 

Chemical Properties

dark red

Uses

Bis(1,5-cyclooctadiene)rhodium(I) tetrafluoroborate is useful for hydrogenation, isomerization reactions and is also employed as a precursor for asymmetric hydrogenations. Furthermore, it is used in the synthesis of cationic COD-Rhodium complexes with phosphine ligands. In addition, it shows an important application for enantioselective hydrogenation and hydrosilylation.

reaction suitability

core: rhodium
reagent type: catalyst

Synthesis

10 grams of rhodium trichloride trihydrate dissolved in 100 ml of anhydrous ethanol and 20 ml of water, measure 37.4 ml of 1,5-cyclooctadiene in a constant pressure funnel, nitrogen displacement protection, the beginning of the dropwise addition of 1,5-cyclooctadiene, dropwise addition is completed, the temperature rise to 82 ?? and keep warm stirring for 18 hours. The reaction solution was concentrated by evaporation, cooled and filtered to obtain 1,5-cyclooctadiene rhodium(II) chloride dimer. Then dissolve all of the above solid in 240 ml of dichloromethane and 17.7 ml of 1,5-cyclooctadiene, protected by nitrogen, slowly dropwise add 60 ml of acetone solution containing 7.5 g of silver tetrafluoroborate at 20 ??, dropwise raise the temperature to 35 ?? and react for 24 hours, filtration, spinning and concentrating, filtration, rinsed with methyl tert-butyl ether, vacuum drying at room temperature, to obtain bis(1,5-cyclooctadiene)tetrafluorine Rhodium(I) borate 13.8 g, the measured metal Rh content 24.92%, the theoretical Rh content 25.30%.

Bis(1,5-cyclooctadiene)rhodium(I) tetrafluoroborate(35138-22-8)Related Product Information

• Sodium tetrafluoroborate
• Octamethylcyclotetrasiloxane
• Rhodium
• 1,3-CYCLOOCTADIENE
• 1,5-Cyclooctadiene
• Potassium tetrafluoroborate
• Fluoroboric acid
• Ammonium fluoborate
• Dichloro(1,5-cyclooctadiene)palladium(II)
• methoxy(cyclooctadiene)rhodium(i) dimer
• Chloro(1,5-cyclooctadiene)iridium(I) dimer
• Bis[1,2-bis(diphenylphosphino)ethane]palladium(0)
• Bis(1,5-cyclooctadiene)rhodium(I) trifluoromethanesulfonate
• BIS(1 5-CYCLOOCTADIENE)RHODIUM(I)
• Bis(1,5-cyclooctadiene)bis(μ-diphenylphosphido)dirhodium
• Tris(dibenzylideneacetone)dipalladium
• Dichloro(1,5-cyclooctadien)ruthenium(II) polymer
• BIS(1,5-CYCLOOCTADIENE)IRIDIUM (I) TETRAFLUOROBORATE