Synthesis and characterization of metal complexes of P, P{sup prime}-DI[3-(trimethylsilyl)-1-propyl] methylenediphosphonic acid{double_dagger}.
The silicon-substituted diphosphonic acid P,P'-di[3-(trimethyl-silyl)-1-propyl] methylenediphosphonic acid, H2DTMSP-[MDP], reacts with metal nitrates in methanol to form complexes M2(DTMSP[MDP])3 for M=Fe, Eu and Yb and M(DTMSP[MDP])2 for M=Th. The sodium salt, Na2-(DTMSP[MDP]), forms upon neutralization of H2DTMSP-[MDP] with NaOH. The calcium salt, Ca(DTMSP[MDP]), forms upon addition of the aqueous metal nitrate to an equivalent amount of the neutralized ligand in methanol. Elemental analysis, infrared spectroscopy and magnetic susceptibility measurements were used to characterize the compounds. Frequency shifts in the asymmetric and symmetric POO- stretching bands of the Fe, Eu, Yb and Th compounds indicate symmetrical coordination of the phosphonate groups through chelate and/or bridging interactions. The frequency difference between these stretching bands becomes smaller as the ionic potential (e/r) of the metal ion increases.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC; EM
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 949425
- Report Number(s):
- ANL/CHM/JA-40805
- Journal Information:
- Syn. React. Inorg. Metalorg. Chem., Journal Name: Syn. React. Inorg. Metalorg. Chem. Journal Issue: 2 ; Feb. 2002 Vol. 32
- Country of Publication:
- United States
- Language:
- ENGLISH
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