Coordination Polymers, 13. Induction of Helicity via Stereogenic Centers: Asymmetric Synthesis of ( P )‐ and ( M )‐Coordination Polymers | Zendy

Saalfrank Rolf W. | Zendy; Decker Michael | Zendy; Hampel Frank | Zendy; Peters Karl | Zendy; von Schnering Hans Georg | Zendy

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Coordination Polymers, 13. Induction of Helicity via Stereogenic Centers: Asymmetric Synthesis of ( P )‐ and ( M )‐Coordination Polymers

Author(s) -

Saalfrank Rolf W.,

Decker Michael,

Hampel Frank,

Peters Karl,

von Schnering Hans Georg

Publication year - 1997

Publication title -

chemische berichte

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.667

H-Index - 136

eISSN - 1099-0682

pISSN - 0009-2940

DOI - 10.1002/cber.19971300921

Subject(s) - chemistry , stereocenter , chloroform , coordination polymer , asymmetric induction , stereochemistry , crystal structure , recrystallization (geology) , crystallography , polymer , coordination complex , metal , organic chemistry , enantioselective synthesis , catalysis , biology , paleontology

Reaction of a methanolic copper(II) acetate solution of enantiomerically pure (5 R )‐/(4 S )‐methyl E ‐(4‐ethyl‐2‐oxazolidinylidene)cyanoacetate 6 leads to the mononuclear chelate complexes ( R, R )‐/ ( S, S )‐ 7 . Recrystallization of ( R, R )‐/( S, S )‐ 7 from non‐coordinating chloroform and asymmetric induction via the stereogenic centers, originating from ( R )‐/( S )‐ 6 , stereospecifically yield the right ‐ and left ‐handed helical ID‐coordination polymers ( P )‐/(M)‐ 8 . The structures of mononuclear complex ( R, R )‐ 7 and of helix ( P )‐ 8 and its mirror image ( M )‐ 8 have been characterised unequivocally by X‐ray crystal structure analyses. ( P )‐ and ( M )‐ 8 crystallize with chloroform to give the clathrates 1 .{[CuL R 2 ]. 2 CHCl 3 } and 1 .{[CuL S 2 ].2CHCl 3 }, respectively.

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