Cycloheptatrienemolybdenum tricarbonyl

Cycloheptatrienemolybdenum tricarbonyl
Identifiers
CAS Number	12125-77-8;
3D model (JSmol)	Interactive image;
ChemSpider	9890723;
PubChem CID	11716002;
	InChI InChI=1S/C7H8.3CO.Mo/c1-2-4-6-7-5-3-1;3*1-2;/h1-6H,7H2;;;; Key: WQAVHVQYKSYTII-UHFFFAOYSA-N;
	SMILES [C-]#[O+].[C-]#[O+].[C-]#[O+].C1C=CC=CC=C1.[Mo];
Properties
Chemical formula	C10H8MoO3
Molar mass	272.12 g·mol−1
Appearance	red-orange solid
Density	1.81 g/cm3
Melting point	100–101 °C (212–214 °F; 373–374 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Cycloheptatrienemolybdenum tricarbonyl is the organomolybdenum compound with the formula (C₇H₈)Mo(CO)₃. It is a red-orange solid that is soluble in nonpolar organic solvents. The compound has no practical value but is a prototypical complex of cycloheptatriene.

Synthesis, structure, and reactions

The compound is prepared by thermal reaction of the triene with molybdenum hexacarbonyl:^[2]

C₇H₈ + Mo(CO)₆ → (C₇H₈)Mo(CO)₃ + 3 CO

The compound is a piano stool complex, consisting of Mo(CO)₃ bound to six carbon centers of the triene. The methylene group projects from the plane of the six coordinated carbon atoms.^[3]

The compound reacts with trityl salts to give the cycloheptatrienyl complex:^[4]

(C₇H₈)Mo(CO)₃ + (C₆H₅)₃C⁺ → [(C₇H₇)Mo(CO)₃]⁺ + (C₆H₅)₃CH

References

^ "Tricarbonyl(cycloheptatriene)molybdenum(0)". Sigma Aldrich. Retrieved 11 October 2017.
^ F. A. Cotton, J. A. McCleverty, J. E. White, "Cycloheptatrienemolybdenum(0) Tricarbonyl" Inorganic Syntheses 1967, volume 9, pp. 121–122. doi:10.1002/9780470132401.ch32
^ J. D. Dunitz and P. Pauling "Struktur des Cycloheptatrien-molybdän-tricarbonyls, C₇H₈Mo(CO)₃" Helv. Chim. Acta 1960 volume 43, pp. 2188-2197. doi:10.1002/hlca.19600430744
^ M. L. H. Green, D. K. P. Ng "Cycloheptatriene and -enyl Complexes of the Early Transition Metals" Chemical Reviews 1995, volume 95, pp. 439-73. doi:10.1021/cr00034a006

[1] "Tricarbonyl(cycloheptatriene)molybdenum(0)". Sigma Aldrich. Retrieved 11 October 2017.

[2] F. A. Cotton, J. A. McCleverty, J. E. White, "Cycloheptatrienemolybdenum(0) Tricarbonyl" Inorganic Syntheses 1967, volume 9, pp. 121–122. doi:10.1002/9780470132401.ch32

[3] J. D. Dunitz and P. Pauling "Struktur des Cycloheptatrien-molybdän-tricarbonyls, C₇H₈Mo(CO)₃" Helv. Chim. Acta 1960 volume 43, pp. 2188-2197. doi:10.1002/hlca.19600430744

[4] M. L. H. Green, D. K. P. Ng "Cycloheptatriene and -enyl Complexes of the Early Transition Metals" Chemical Reviews 1995, volume 95, pp. 439-73. doi:10.1021/cr00034a006

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