CID 101804371 → C20H43Ta

HRID 2397202Notes

Reaction equation

HRID 2397202 reaction equation
[Cl-].[Cl-].[CH2:3]([Ta+2:8]([CH2:14][C:15]([CH3:18])([CH3:17])[CH3:16])[CH2:9][C:10]([CH3:13])([CH3:12])[CH3:11])[C:4]([CH3:7])([CH3:6])[CH3:5].[CH2:19]([Li])[C:20]([CH3:23])([CH3:22])[CH3:21]>CCCCC>[CH2:14]([Ta:8]([CH2:19][C:20]([CH3:23])([CH3:22])[CH3:21])([CH2:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[CH:9][C:10]([CH3:13])([CH3:12])[CH3:11])[C:15]([CH3:18])([CH3:17])[CH3:16]

Participants

4

Reactant 2

HCID 178445873CID 101804371HCID 178506860HCID 178506860, compound

Product 1

HCID 178446067C20H43Ta

Reagents, catalysts & solvents 1

HCID 8003PentaneSolvent

Procedure

a solution of 0.5 g of trineopentyltantalum dichloride and 0.17 g of neopentyllithium in 4 ml of pentane was allowed to stand at room temperature for 24 hr in a glass vessel wrapped in foil. (In later experiments it was found that the foil wrapping was unnecessary.) The lithium chloride that had precipitated was separated by filtration, and the filtrate was allowed to stand for another 24 hr at room temperature. No more solid precipitated during this time. Volatile materials were removed under reduced pressure to give trineopentyl(neopentylidene)tantalum, (C5H11)3Ta=C5H10, as an orange crystalline solid.

Workup

  1. custom) The lithium chloride that had precipitated
  2. customwas separated by filtration
  3. waitto stand for another 24 hr at room temperature
  4. customNo more solid precipitated during this time
  5. customVolatile materials were removed under reduced pressure

Sources & evidence

ORD record
ord-5e3203dfdd1e45b4b29aebcd3d190b06
Source dataset
uspto-grants-1977_05
Patent number
US04021429

Reaction notes

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