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Related Concept Videos

Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Colors and Magnetism03:02

Colors and Magnetism

Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Structural Isomerism02:34

Structural Isomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Properties of Transition Metals02:58

Properties of Transition Metals

Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
Cycloaddition Reactions: MO Requirements for Thermal Activation01:16

Cycloaddition Reactions: MO Requirements for Thermal Activation

Thermal cycloadditions are reactions where the source of activation energy needed to initiate the reaction is provided in the form of heat. A typical example of a thermally-allowed cycloaddition is the Diels–Alder reaction, which is a [4 + 2] cycloaddition. In contrast, a [2 + 2] cycloaddition is thermally forbidden.

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Volatile Heteroleptic Molybdenum Complexes: Synthesis, Structure, and Thermal Properties.

Sung Kwang Lee1,2, Ji Yeon Ryu1, Bo Keun Park1

  • 1Thin Film Materials Research Center, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea.

Inorganic Chemistry
|June 6, 2026
PubMed
Summary
This summary is machine-generated.

New molybdenum complexes were synthesized to overcome limitations of traditional precursors for thin film deposition. Complex 4 shows potential as a vapor-phase deposition precursor for molybdenum-containing films.

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Thin Film Deposition

Background:

  • Molybdenum (Mo)-based thin films are crucial for microelectronics and catalysis.
  • Existing precursors like molybdenum hexacarbonyl (Mo(CO)6) have drawbacks due to carbonyl groups.
  • Developing novel precursors is essential for high-quality thin film fabrication.

Purpose of the Study:

  • To synthesize new heteroleptic molybdenum complexes with improved properties.
  • To overcome the disadvantages associated with carbonyl ligands in Mo(CO)6.
  • To identify a suitable precursor for vapor-phase deposition of molybdenum-containing thin films.

Main Methods:

  • Synthesis of new molybdenum complexes using Mo(η3-allyl)(CO)2(MeCN)2Cl and tridentate-NNO ligands.
  • Characterization via Fourier transform infrared spectroscopy (FT-IR), elemental analysis (EA), and single crystal X-ray diffraction.
  • Thermal analysis using thermogravimetric analysis (TGA) and vapor pressure analysis.

Main Results:

  • Seven new heteroleptic molybdenum complexes were successfully synthesized.
  • Complex 4, Mo(crotyl)(CO)2(demamp), exhibited suitable vapor pressure for deposition applications.
  • Characterization confirmed the structure and properties of the synthesized complexes.

Conclusions:

  • The synthesized molybdenum complexes offer potential alternatives to Mo(CO)6.
  • Complex 4 is identified as a promising precursor for vapor-phase deposition of molybdenum thin films.
  • This research contributes to the advancement of materials for microelectronics and catalysis.