1,7-OCTADIYNE Chemical Properties

Melting point:

27°C (estimate)

Boiling point:

135-136 °C (lit.)

Density 

0.8 g/mL at 25 °C (lit.)

refractive index 

n20/D 1.446(lit.)

Flash point:

74 °F

storage temp. 

2-8°C

solubility 

Not miscible or difficult to mix.

form 

Liquid

Specific Gravity

0.817

color 

Clear colorless to faintly yellow

BRN 

1697275

CAS DataBase Reference

871-84-1(CAS DataBase Reference)

EPA Substance Registry System

1,7-Octadiyne (871-84-1)

Safety Information

Hazard Codes 

Xi

Risk Statements 

10-36/37/38

Safety Statements 

16-26-36/37/39

RIDADR 

UN 3295 3/PG 3

WGK Germany 

3

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

HS Code 

29012990

MSDS

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

1,7-OCTADIYNE Usage And Synthesis

Chemical Properties

clear colorless to faintly yellow liquid

Uses

1,7-Octadiyne is an useful bifunctional chain extension unit. It participates in the formation of uranium(IV) vinyl complexes. It reacts with frustrated Lewis pair P(o-tolyl)3/B(C6F5)3 by acetylene C-C coupling to yield the zwitterionic product. It undergoes the reductive cyclization during reaction with Re2Cl4(?-dppm)2 (dppm = Ph2PCH2PPh2) and affords quadruply bonded dirhenium(III) complex Re2Cl3(?,η2-C8H7)(?-dppm)2.

General Description

1,7-Octadiyne is a terminal bis-alkyne and participates in the formation of uranium(IV) vinyl complexes. It reacts with frustrated Lewis pair P(o-tolyl)₃/B(C₆F₅)₃ by acetylene C-C coupling to yield the zwitterionic product. It undergoes the reductive cyclization during reaction with Re₂Cl₄(μ-dppm)₂ (dppm = Ph₂PCH₂PPh₂) and affords quadruply bonded dirhenium(III) complex Re₂Cl₃(μ,η²-C₈H₇)(μ-dppm)₂.

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