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Insights into the κ-P,N Coordination of 1,3,5-Triaza-7-phosphaadamantane and Derivatives: κ-P,N-Heterometallic Complexes and a 15 N Nuclear Magnetic Resonance Survey
Complexes {[(PTA)
CpRu-μ-CN-1
:2
-RuCp(PTA)
-ZnCl
]}·2DMSO (
) {[ZnCl
(H
O)]-(PTA-1κ
:2κ
)(PTA)CpRu-μ-CN-1κ
:2κ
-RuCp(PTA)(PTA-1κ
:2κ
)-[ZnCl
(H
O)]}Cl (
), [RuCp(HdmoPTA)(PPh
)(PTA)](CF
SO
)
(
), [RuCp(HdmoPTA)(HPTA)(PPh
)](CF
SO
)
(
), and [RuCp(dmoPTA)(PPh
)(PTA)](CF
SO
) (
) were obtained and characterized, and their crystal structure together with that of the previously published complex
is reported. The behavior of the 1,3,5-triaza-7-phosphatricyclo[3.3.1.13,7]decane (PTA) and 3,7-dimethyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane (dmoPTA) ligands against protonation and κ
-coordination is discussed, on the basis of
N nuclear magnetic resonance data collected on 22 different compounds, including PTA (
), HdmoPTA (
H), and some common derivatives as free ligands (
and
), along with mono- and polymetallic complexes containing PTA and/or HdmoPTA (
).
N detection via
H-
N heteronuclear multiple bond correlation allowed the construction of a small library of
N chemical shifts that shed light on important features regarding κ
-coordination in PTA and its derivatives.