68829-55-0

Basic information

• Product Name: Cr(CNC₆H₁₁)6
• CAS NO: 68829-55-0
• Molecular Weight: 707.022
• Mol File: 68829-55-0.mol

Chemical Properties

• CAS DataBase Reference: Cr(CNC₆H₁₁)6(CAS DataBase Reference)
• NIST Chemistry Reference: Cr(CNC₆H₁₁)6(68829-55-0)
• EPA Substance Registry System: Cr(CNC₆H₁₁)6(68829-55-0)

Safety Data

• Hazardous Substances Data: 68829-55-0(Hazardous Substances Data)

Upstream product

• 931-53-3 Cyclohexyl isocyanide 
• 67953-89-3 bis(1-methylnaphthalene)chromium 
• 98300-87-9 (C₁₀H₇OSi₄O₄(CH₃)7)2Cr 

Relevant articles and documents

Naphthalene Complexes. Part 1. Metal Vapour Preparation of Bis(η6-naphthalene)chromium(o) and its Arene Replacement Reactions

Bis(η6-naphthalene)chromium(o), formed in high yield from chromium atoms and naphthalene in solution at -80 deg C, is a thermally stable but very reactive compound.Two-electron donor ligands displace one naphthalene ring or both naphthalene rings (L = CO, CNBut, or CNC6H11) in rapid reactions at room temperature.The product is susceptible to further displacement of naphthalene by CO at 0 deg C.The reaction of chromium atoms with 1,4-dimethylnaphthalene is stereospecific.More than 95percent of the product is the isomer of in which the unsubstituted ring is bonded to the metal.Bis(1-methylnaphthalene)chromium exists as a mixture of 10 isomers which can be distinguished on the basis of their (1)H n.m.r. spectra.

Synthetic approaches to macromolecules containing the bis(μ6-naphthalene)metal moiety

A poly[(dimethylsiloxane)-co-(2-naphthoxymethylsiloxane)], 5, has been synthesized from either (chloromethyl)heptamethylcyclotetrasiloxane (1) or poly(dimethylsiloxane). The synthetic procedures also permit the preparation of the corresponding 1- or 2-naphthoxyheptamethylcyclotetrasiloxane, 4 (a and b), starting from 1. These siloxanes react with Cr or V vapors to afford poly- or cyclosiloxane bound bis(η6-naphthalene)metal complexes. In contrast, reaction with Ti leads to attack on the siloxane and no bis(arene) complex is observed. Using cyclosiloxane 4b as a model for the polymer 5 in macroscale metal vapor reactions, it is found that chromium coordinates exclusively to the nonsubstituted ring. The chromium complexes of 4b and 5 exhibit very similar ligand displacement chemistry although some differences from that of (η6-C10H8)2Cr are noted. Thus reaction with CO leads to the analogous (arene)Cr(CO)3 complexes while RNC (R = tert-butyl or cyclohexyl) affords the corresponding Cr(CNR)6 species.