Cyclopentadienyl Complexes of Chromium, Molybdenum and Tungsten

Morris, Michael J.

doi:10.1016/b978-008046519-7.00044-7

Comprehensive Organometallic Chemistry II 1995

DOI: 10.1016/b978-008046519-7.00044-7

|View full text |Cite

Cyclopentadienyl Complexes of Chromium, Molybdenum and Tungsten

Michael J. Morris

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1997

1998

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 1,329 publications

(354 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

Tungsten-Mediated Syntheses of Fused α-Methylenebutyrolactones from Propargyl Bromides Containing Tethered Aldehydes and Ketones

1997

View full text Add to dashboard Cite

The reaction of CpW(CO)(3)Na with a number of propargyl bromides with tethered aldehydes and ketones afforded eta(1)-propargyl species that were subsequently transformed into tungsten-eta(3)-2-(methoxycarbonyl)allyl compounds upon treatment with p-TSA/CH(3)OH; the overall yields exceeded 60%. Sequential treatment of these tungsten-eta(3)-allyl complexes with NOBF(4) and NaI in CH(3)CN led to intramolecular allyltungsten-carbonyl cyclization, yielding fused alpha-methylene butyrolactones of five-, six-, and seven-membered carbocyclic rings. All the reactions proceeded with high diastereoselectivities except for 9-methylene-7-oxabicyclo[4.3.0]nonan-8-one (22) and 10-methylene-8-oxabicyclo[5.3.0]decan-9-one (23). Modification of the metal center with a chloride ligand led to significant improvement of the trans-stereoselection of 22; the chloride modification did not significantly enhance stereoselection of 23. The stereochemical course of the reaction products is rationalized on the basis of a bicyclic transition-state mechanism.

show abstract

Tungsten-Mediated Syntheses of Fused α-Methylenebutyrolactones from Propargyl Bromides Containing Tethered Aldehydes and Ketones

1997

View full text Add to dashboard Cite

show abstract

New Synthetic Pathway to Mono- and Bis-indenyl Complexes of Molybdenum(IV)

et al. 1998

View full text Add to dashboard Cite

The complex IndMoCl3(CO)2 (Ind = η5-C9H7) has been synthesized by the reaction of IndMo(η3-C3H5)(CO)2 with HCl gas in dichloromethane at 25 °C. Thermal decarbonylation of IndMoCl3(CO)2 in chloroform gives paramagnetic IndMoCl3 (μeff = 1.48 μB). A consistent stepwise route to bis-indenyl derivatives of molybdenum is available upon treatment of IndMoCl3(CO)2 with KInd in THF at low temperature. The complex IndMo(η3-Ind)(CO)2 is obtained in high yield and opens a convenient entry into bis-indenyl molybdenum chemistry. The reaction of IndMo(η3-Ind)(CO)2 with Ph3CBF4, in CH2Cl2, yields [Ind2Mo(CO)2][BF4]2. Solvolysis of [Ind2Mo(CO)2][BF4]2 in acetonitrile affords [Ind2Mo(CO)(NCMe)][BF4]2 and [Ind2Mo(NCMe)2][BF4]2. The reaction of [Ind2Mo(NCMe)2][BF4]2 with [Bu4N][S2CNEt2] forms the dithiocarbamate complex [Ind2Mo(S2CNEt2)][BF4]. The molecular structures of IndMo(η3-Ind)(CO)2 and [Ind2Mo(S2CNEt2)][BF4] have been determined by single-crystal X-ray diffraction.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Cyclopentadienyl Complexes of Chromium, Molybdenum and Tungsten

Cited by 2 publications

References 1,329 publications

Tungsten-Mediated Syntheses of Fused α-Methylenebutyrolactones from Propargyl Bromides Containing Tethered Aldehydes and Ketones

Tungsten-Mediated Syntheses of Fused α-Methylenebutyrolactones from Propargyl Bromides Containing Tethered Aldehydes and Ketones

New Synthetic Pathway to Mono- and Bis-indenyl Complexes of Molybdenum(IV)

Contact Info

Product

Resources

About