Premium
Cover Picture (Angew. Chem. Int. Ed. Engl. 12/1993)
Publication year - 1993
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199316711
Subject(s) - dimer , crystallography , hydrogen bond , ball (mathematics) , combinatorics , chemistry , nanotechnology , physics , materials science , mathematics , molecule , geometry , quantum mechanics , organic chemistry
The cover picture shows a tennis ball as well as the structure of a dimer generated with the Insight II 2.2.0 program (Biosym Technologies) and optimized by using the Discover force field. The two halves of the structure are held together by hydrogen bonds (yellow dashed lines; C atoms green, N atoms blue, O atoms red, H atoms white). The symmetric monomers have 1,2,4,5‐tetramethylenebenzene cores, to which are added two diphenylglycoluril units (the phenyl groups and the H atoms not involved in hydrogen bonds have been omitted for clarity). The two monomers are self complementary and are “interlocked” like the two halves of a tennis ball (in the picture the orientations of the tennis ball and of the dimer are orthogonal to each other). More about this dimer which is even stable in the gas phase is reported by J. Rebek, Jr., J. de Mendoza, and R. Wyler on pages 1699 ff.