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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.
Boris Kosog.; Christos E Kefalidis.; Frank W Heinemann.; Laurent Maron.; Karsten Meyer. Uranium(III)-mediated C-C-coupling of terminal alkynes: fo rmation of dinuclear uranium(IV) vinyl complexes. Journal of the American Chemical Society. 2012, 134 (30), 12792-12797.
Chao Chen.; Roland Fröhlich.; Gerald Kehr.; Gerhard Erker. Remarkably variable reaction modes of frustrated Lewis pairs with non-conjugated terminal diacetylenes. Chemical Communications. 2010, 46 (20), 3580-3582.
Useful bifunctional chain extension unit. For use in Co-mediated [2+2+2] cyclotrimerization reactions, see: Synthesis, 1374 (1994).
Hazard Statements: H226-H315-H319
Flammable liquid and vapour. Causes skin irritation. Causes serious eye irritation.
Precautionary Statements: P210-P233-P235-P240-P241-P242-P243-P261-P264b-P271-P280-P303+P361+P353-P304+P340-P305+P351+P338-P312-P332+P313-P337+P313-P363-P370+P378q-P501c
Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Keep container tightly closed. Keep cool. Ground/bond container and receiving equipment. Use explosion-proof electrical/ventilating/lighting/ equipment. Use only non-sparking tools. Take precautionary measures against static discharge. Avoid breathing dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Use only outdoors or in a well-ventilated area. Wear protective gloves/protective clothing/eye protection/face protection. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Call a POISON CENTER or doctor/physician if you feel unwell. If skin irritation occurs: Get medical advice/attention. If eye irritation persists: Wash contaminated clothing before reuse. In case of fire: Use CO2, dry chemical, or foam Dispose of contents/ container to an approved waste disposal plant