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Direct Observation of the Central Atom in [C{Au[C 6 H 5 )2( p C 6 H 4 Nme 2 )]} 6 ](BF 4 ) 2 by 13 C NMR Spectroscopy
Author(s) -
Schmidbaur Hubert,
Brachthäuser Benno,
Steigelmann Oliver
Publication year - 1991
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199114881
Subject(s) - multiplicity (mathematics) , atom (system on chip) , crystallography , octahedron , chemistry , atomic physics , chemical bond , isotope , physics , crystal structure , nuclear physics , mathematical analysis , mathematics , computer science , embedded system , organic chemistry
The synthesis of the title compound in which the interstitial C atoms are mainly 13 C isotopes makes the proof of these octahedral hypercoordinated atoms possible. The septet multiplicity and the coupling constants confirm the postulated surroundings and agree with the expectations regarding bonding. The chemical shift δ ( 13 C) = 137.27 is more difficult to understand. Relativistic effects must be taken into account in the crucial theoretical calculations.