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Azimine. III . Kristallstruktur von (1 E , 2 Z )‐ und (1 Z , 2 E )‐2, 3‐Dimethyl‐1‐phthalimido‐azimin ,
Author(s) -
Moor Robert,
Grieb Rita,
Niggli Alfred,
Hoesch Lienhard,
Dreiding André S.
Publication year - 1979
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19790620430
Subject(s) - chemistry , triclinic crystal system , crystal structure , crystallography , stereochemistry , stereocenter , crystal (programming language) , adduct , double bond , biochemistry , organic chemistry , enantioselective synthesis , catalysis , computer science , polymer chemistry , programming language
Azimines. III. Teilweise vorgetragen in Bern an der Jahresversammlung der Schweizerischen Gesellschaft für Kristallographie, 7.Oktober 1977, und als Autoreferat veröffentlicht [2]. Crystal structure of (1 E ,2 Z )‐ and (1 Z ,2 E )‐2,3‐dimethyl‐1‐phthalimido‐azimine Teilweise aus der Diplomarbeit von R. M. , ETH Zürich 1977. The structures of two diastereoisomeric 2,3‐dimethyl‐1‐phthalimido‐azimines, obtained by addition of phthalimido‐nitrene to ( E )‐azomethane, have been determined by X‐ray analysis. The major adduct 2a forms rhombic (space group Cmc2 1 ), the minor one 2b triclinic crystals (space group P l ). The molecular structures of 2a and 2b in the crystal exhibit several interesting features: (1) The azimines 2a and 2b are true dipolar systems with a coplanar skeleton and with bond angles of about 120°. Thus both azimine N,N bonds are potentially stereogenic centers; (2) 2a and 2b differ in configuration at both of these centers: 2a has