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Inne

A new family of chiral chelating diamines with transition-metal stereocenters: synthesis, structure, and reactivity of the enatiomerically pure dirhenium-substituted 1,2-diamine (η5-C5H5)Re(NO)-(PPh3)(CH2N(CH3)CH2CH2(H3C)NCH2)(Ph3P)(ON)Re(η5-C5H5).

Autorzy

L. J. Alvey

O. Delacroix

C. Wallner

O. Meyer

Frank A. Hampel

Sławomir Szafert

Tadeusz Lis

John A. Gladysz

Rok wydania

2001

Czasopismo

Organometallics

Numer woluminu

20

Strony

3087-3096

DOI

10.1021/om010153a

Kolekcja

Naukowa

Język

Angielski

Typ publikacji

Artykuł

Streszczenie

Reaction of enantiopure (S)-(η5-C5H5)Re(NO)(PPh3)(CH3) ((S)-1) with Ph3C+BF4- (1 equiv) and then the N,N‘-dimethyl 1,2-diamine HN(CH3)CH2CH2(H3C)NH (0.5 equiv) gives the diammonium salt (SReSRe)-[(η5-C5H5)Re(NO)(PPh3)(CH2NH(CH3)CH2CH2(H3C)HNCH2)(Ph3P)(ON)Re(η5-C5H5)]2+(BF4-)2 (94%) as a mixture of Re/N configurational diastereomers. Reaction with t-BuOK yields the title compound (SReSRe)-4 (66%) as an air-stable orange powder. Reaction with (PhCN)2PdCl2 gives a single diastereomer of a chelate complex, (80%), the configuration and approximate C2 symmetry of which has been established crystallographically. Racemic 1, Ph3C+BF4- (1 equiv), and the N,N‘-dimethyl 1,2-diamine HN(CH2CH3)CH2CH2(H3CCH2)NH (1 equiv) give [(η5-C5H5)Re(NO)(PPh3)(CH2NH(CH2CH3)CH2CH2NH(CH2CH3))]+BF4-, and the crystal structure of the SReSN,RReRN diastereomer is determined. The ReCH2N conformations of the preceding compounds, and their influence upon the diastereoselectivities, are analyzed in detail

Słowa kluczowe

Cations, Coordination compounds, Molecular structure, Nitrogen, rhenium

Adres publiczny

https://doi.org/10.1021/om010153a

Strona internetowa wydawcy

https://www.acs.org/content/acs/en.html

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