252344-52-8

Basic information

• Product Name: tricarbonyl[η(6)-(p-ethynyl-phenylethynyl)benzene]chromium
• CAS NO: 252344-52-8
• Molecular Weight: 338.283
• Mol File: 252344-52-8.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: tricarbonyl[η(6)-(p-ethynyl-phenylethynyl)benzene]chromium(CAS DataBase Reference)
• NIST Chemistry Reference: tricarbonyl[η(6)-(p-ethynyl-phenylethynyl)benzene]chromium(252344-52-8)
• EPA Substance Registry System: tricarbonyl[η(6)-(p-ethynyl-phenylethynyl)benzene]chromium(252344-52-8)

Safety Data

• Hazardous Substances Data: 252344-52-8(Hazardous Substances Data)

Upstream product

• 12082-05-2 (η6-fluorobenzene)tricarbonylchromium 
• 935-14-8 1,4-diethynylbenzene 

Relevant articles and documents

Nucleophilic substitution reactions of acetylides on substituted tricarbonyl(η6-fluoroarene)chromium and reactions of tricarbonyl[η6-(2-trimethylsilylethynyl)toluene]chromium and tricarbonyl[η6-(p-ethynyl-phenylethynyl)benzene]chromium with dicobalt octacarbonyl

Nucleophilic substitution reactions of various acetylides on substituted tricarbonyl(η6-fluoroarene)chromiums were pursued. The reaction presumably underwent a more complicated mechanism rather than the direct substitution on the fluorine-bearing carbon. The organometallic compounds (η6-C6H3R1R2R 3)Cr(CO)3 (R1: CC-C6H4CH3, R2: o-Me, R3: H (5a), R1: CC-C6H4CH3, R2: o-OMe, R3: H (6a), R1: CC-C6H4CH3, R2: m-OMe, R3: H (6b), R1: CCPh, R2: o-Me, R3: o-OMe (8b), R1: CCPh, R2: m-Me, R3: m-OMe (8c), R1: CCSiMe3, R2: o-Me, R3: H (9a), R1: CC-C6H4CCH, R2: H, R3: H (12), R1: CC-C6H4CCH, R2: o-Me, R3: H (13)) as well as the organometallic dimmer [{(η6-o-Me-C6H4)Cr(CO) 3(di-ethynyl)] (di-ethynyl: CC-C6H4CC (14)) have been synthesized from nucleophilic substitution reactions of tricarbonyl(η6-fluoroarene)(chromium) compounds with suitable acetylides. The products have been characterized by spectroscopic means. In addition, (8b) and (8c) were characterized by X-ray diffraction studies. Further reactions of (9a) and (12) with appropriate amount of Co2(CO)8 yielded μ-alkyne bridged bimetallic complexes, Co2(CO)6{μ-Me3SiCC-(o-tolueneCr(CO) 3} (10) and (Co2(CO)6)2{μ-HCC-C6H 4-CC-(benzene)Cr(CO)3)}(15), respectively. Both (10) and (15) were characterized by spectroscopic means as well as single crystal X-ray crystallography. The core of these molecules is quasi-tetrahedron containing a Co2C2 unit. A two-dicobalt-fragments coordinated di-enyls complex, (Co2(CO)6)2{μ-HCC-C6H 4-CC-H} (17), was synthesized from the reaction of 1,3-diethynylbenzene with Co2(CO)8. Crystallographic studies of (17) also show that it exhibits a distorted Co2C2 quasi-tetrahedral geometry. Elsevier Science Ltd.