Synthesis of Fulvalene-Bridged Bimetallic Compounds Containing a Substituted Cyclopentadienyl Group Based on Pauson−Khand Chemistry

Abstract

From the Pauson−Khand products 2-ferrocenylcyclopentenone (2) and 2-ferrocenyl-3-methylcyclopentenone (10) as starting materials, substituted ferrocene complexes (C5H5-η5-C5H4)Fe(C5H5) (4), (CH3C5H4-η5-C5H4)Fe(C5H5) (12), and (Me2C5H3-η5-C5H4)Fe(C5H5) (16) were prepared. Metalation of 4, 12, and 16 with Mn(CO)5Br, Cr(CO)3(CH3CN)3, FeCl2(THF) n , and the deprotonated form of [CpFe(fluorene)]+ resulted in good yields of fulvalenyl-bridged heterobi- and polymetallic compounds. The molecular structures of [1-{(C5H4)Fe(C5H5)}-2-CH3C5H4]Mn(CO)3 (13), [2-{(C5H4)Fe(C5H5)}-1,3-Me2C5H2] Mn(CO)3 (17), [2-{(C5H4)Fe(C5H5)}-1,3-Me2C5H2]Fe(C5H5) (18), and [1-{(C5H4)Fe(C5H5)}-2,3,4,5-Me4C5]Fe(C5H5) (23) are reported.

Syntheses, Structures, and Reactivities of 2,3-Pyrazyl-Linked Bis(1-aza-allyl) Alkali-Metal Complexes

“…The average Na−N distance of 2.420 Å is comparable with the distance of 2.434 Å in 1,3,5,7-tetraazaheptatrienylsodium and the distance of 2.355 Å in [Na{N(SiMe 3 ) 2 }] . The trans conformation of Na(2) and Na(2‘), existing on opposite sides of the NCCCN moiety, is to minimize the sterical crowding in the ligands. , Compound 4 consists of two different potassium environments: the K(1) atom is coordinated to three THF molecules and one NCCCN fragment, and the K(2) atom is bound to two NCCCN moieties of different ligands. One more THF molecule was found in the potassium atom when compared with its sodium analogue, due to a larger and more electropositive metal center.…”

Organometallic−Organic Hybrid Crystals from Ferrocenyl Dipyridine and Binaphthol: Different Crystal Structures and Nonlinear Optical Properties Depending upon the Reaction Medium and Optical Purity of Binaphthol

“…Crystal data and details of refinement are given in Table , and Figure shows the view of molecule 1 , which belongs to noncentrosymmetric P 2 1 2 1 2 1 . For the structure of 1 , bonding parameters fall in the expected range . The Cp rings are planar and nearly parallel, the angle between the planes being 1.30°.…”