Structures were solved with direct
methods using SHELXL-97 and refined by full matrix
least-squares methods on F2with SHELXL-97.
Nonhydrogen atoms were refined with anisotropic thermal
parameters. All hydrogen atoms were geometrically fixed
and allowed to refine using a riding model. Atomic coordinates,
bond angles, bond lengths, and thermal parameters
associated with complex 7 have been deposited at the
Cambridge Crystallographic Data Center (CCDC code is
754970). The crystal data and structure refinement parameters for complex7are given in Table1.