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Lithium‐cyclopropylethinylamidinates
Author(s) -
Sroor Farid M. A.,
Hrib Cristian G.,
Hilfert Liane,
Edelmann Frank T.
Publication year - 2013
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300424
Subject(s) - deprotonation , substituent , lithium (medication) , chemistry , lithium atom , carbon atom , stereochemistry , solid state , medicinal chemistry , crystallography , organic chemistry , ion , ring (chemistry) , medicine , ionization , endocrinology
A series of six new lithium‐cyclopropylethinylamidinates, Li[ c ‐C 3 H 5 –C≡C–C(NR) 2 ]·S (R = i Pr, S = Et 2 O ( 2a ), THF ( 2b ), DME ( 2c ); R = cyclohexyl (Cy), S = Et 2 O (3a), THF ( 3b ), DME ( 3c )) were prepared and fully characterized. The synthetic protocol involves in situ‐deprotonation of commercially available cyclopropylacetylene followed by treatment with either N , N′ ‐diisopropylcarbodiimide or N , N′ ‐dicyclohexylcarbodiimide. The cyclopropyl substituent exerts a significant influence on the 13 C NMR spectroscopic shift of the acetylenic carbon atom to which it is bound. X‐ray diffraction studies of 2b and 3b revealed that in the solid state the new lithium amidinates adopt ladder‐type dimeric molecular structures.