Affiliation:
1. Department of Chemistry, University at Albany, State University of New York, 1400 Washington Ave, Albany, NY 12222, USA
Abstract
An unusual heterobimetallic volatile compound [Pb2Co5(acac)14] was synthesized by the gas phase/solid-state technique. The preparation can be readily scaled up using the solution approach. X-ray powder diffraction, ICP-OES analysis, and DART mass spectrometry were engaged to confirm the composition and purity of heterobimetallic complex. The composition is unique among the large family of lead(tin): transition metal = 2:1, 1:1, and 1:2 β-diketonates compounds that are mostly represented by coordination polymers. The molecular structure of the complex was elucidated by synchrotron single crystal X-ray diffraction to reveal the unique heptanuclear moiety {Co(acac)2[Pb(acac)2-Co(acac)2-Co(acac)2]2} built upon bridging interactions of acetylacetonate oxygens to neighboring metal centers that bring their coordination numbers to six. The appearance of unique heptanuclear assembly can be attributed to the fact that the [Co(acac)2] units feature both cis- and trans-bis-bridging modes, making the polynuclear moiety rather flexible. This type of octahedral coordination is relatively unique among known lead(tin)-3d transition metal β-diketonates. Due to the high-volatility, [Pb2Co5(acac)14] can be potentially applied as a MOCVD precursor for the low-temperature preparation of lead-containing functional materials.
Funder
National Science Foundation
Subject
Inorganic Chemistry,Condensed Matter Physics,General Materials Science,General Chemical Engineering
Reference32 articles.
1. Fluorinated Heterometallic β-Diketonates as Volatile Single-Source Precursors for the Synthesis of Low-Valent Mixed-Metal Fluorides;Navulla;J. Am. Chem. Soc.,2011
2. New Class of Single-Source Precursors for the Synthesis of Main Group-Transition Metal Oxides: Heterobimetallic Pb-Mn Beta-Diketonates;Zhang;Inorg. Chem.,2009
3. Mixed-Ligand Approach to Design of Heterometallic Single-Source Precursors with Discrete Molecular Structure;Lieberman;Inorg. Chem.,2014
4. Magnetische Eigenschaften der Verbindungen BaMF4 und Pb2MF6 (M = Mn, Fe, Co, Ni, Cu, Zn);Monatshefte Für Chemie.,1972
5. Caractérisations physiques du ferrites de plomb Pb2Fe2O5;Grenier;Rev. Chim. Miner.,1977