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A Paramagnetic Diniobium Complex with a Very Short Nb−Nb Distance: Evidence for a Pseudo Nb−Nb Triple Bond?
Author(s) -
Tayebani Maryam,
Feghali Khalil,
Gambarotta Sandro,
Yap Glenn P. A.,
Thompson Laurence K.
Publication year - 1999
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19991216)38:24<3659::aid-anie3659>3.0.co;2-z
Subject(s) - intermetallic , paramagnetism , niobium , triple bond , crystallography , materials science , bond length , condensed matter physics , chemistry , crystal structure , metallurgy , physics , double bond , polymer chemistry , alloy
Abstract In spite of the short Nb−Nb distance (2.268 Å) and the presumable existence of an Nb≡Nb bond, the paddle‐wheel‐shaped diniobium( II ) complex 1 is paramagnetic. Theoretical calculations indicate that the presence of LiCl moieties on the intermetallic axis lowers the Nb−Nb bond order and is responsible for the observed paramagnetism.