1,7-Octadiyne

CAS NO.：871-84-1
Empirical Formula: C8H10
Molecular Weight: 106.17
MDL number: MFCD00008580
EINECS: 212-815-0
SAFETY DATA SHEET (SDS)
Update Date: 2026-09-12 18:50:26

What is 1,7-Octadiyne?

Chemical properties

clear colorless to faintly yellow liquid

The Uses of 1,7-Octadiyne

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)₃by 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.

Properties of 1,7-Octadiyne

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 for 1,7-Octadiyne

Signal word	Warning
Pictogram(s)	Flame Flammables GHS02 Exclamation Mark Irritant GHS07
GHS Hazard Statements	H226:Flammable liquids H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233:Keep container tightly closed. P240:Ground/bond container and receiving equipment. P241:Use explosion-proof electrical/ventilating/lighting/…/equipment. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.