14434-47-0

Usage

Uses

Used in Chemical Vapor Deposition Processes:
CHROMIUM TRIS(2,2,6,6-TETRAMETHYL-3,5-HEPTANEDIONATE) is used as a precursor for the production of thin films of chromium oxide. Its role in this process is crucial for creating high-quality films with specific properties required for various applications.
Used in Electronics Industry:
In the electronics industry, CHROMIUM TRIS(2,2,6,6-TETRAMETHYL-3,5-HEPTANEDIONATE) is utilized in the production of materials for electronic devices such as semiconductors and thin film transistors. Its thermal resistance and stability contribute to the performance and reliability of these devices.
Used in Pigment and Dye Manufacturing:
CHROMIUM TRIS(2,2,6,6-TETRAMETHYL-3,5-HEPTANEDIONATE) is also employed in the manufacturing of pigments, dyes, and other colored materials. Its chemical properties allow for the creation of stable and vibrant colors that are used across different industries for various purposes.

InChI:InChI=1/3C11H20O2.Cr/c3*1-10(2,3)8(12)7-9(13)11(4,5)6;/h3*7,12H,1-6H3;/q;;;+3/p-3/b3*8-7-;/rC33H57CrO6/c1-28(2,3)22(35)19-25(31(10,11)12)38-34(39-26(32(13,14)15)20-23(36)29(4,5)6)40-27(33(16,17)18)21-24(37)30(7,8)9/h19-21H,1-18H3/b25-19-,26-20-,27-21-

Upstream product

• 1118-71-4 2,2,6,6-tetramethylheptane-3,5-dione 

Relevant academic research and scientific papers

Syntheses, crystal structures, and thermal stabilities of polymorphs of Cr(thd)3

The syntheses, crystal structures, and thermal stabilities of six polymorphs of Cr(thd)3 [(thd)- = anion of H(thd) = C 11H20O2 = 2,2,6,6-tetramethylheptane-3,5-dione] were studied using X-ray diffraction and differential scanning calorimetry. Compound 1 is thermodynamically stable below ca. 110 °C and forms plate-shaped crystals [a = 9.927(5), b = 18.010(5), c = 21.427(5) A, and β = 95.461(5)° at 295 K; space group C2/c]. Its crystal structure is isotypic with Mn(thd)3. Polymorph 4 is metastable to 1, and the only way to prepare 4 appears to be by precipitation from solution. Crystals of 4 are needle shaped [a = 28.54(3), b = 19.14(2), c = 21.92(2) A, and β = 97.31(2)° at 295 K; space group C2/c] and this structure is isotypic with monoclinic Co(thd)3. Modifications 2, 2*, and 5 also appear as needle-shaped crystals [orthorhombic: a = 18.97(7), b = 18.69(7), and c = 10.62(5) A for 2 and tetragonal: a = b = 18.93(5) and c = 10.57(4) A for 5, both at 110 K]. Crystals of 2 and 5 have limited lifetime, which depends on storage temperature and exposure to X-rays. The conversion sequence is: 5 → 2 → 1, where the first step takes 3 to 4 h and the second some 20 h. Attempts to establish detailed accounts of the orthorhombic Co(thd) 3-type structure of 2 and 2* by SXD were unsuccessful due to disorder. The structural distinction between 2 and 2* appears to be associated with rotational disorder among the Cr(thd)3 molecules. 2* and 3 are high-temperature modifications with stability range ca. 155-200 and ca. 200-235 °C, respectively [Cr(thd)3 melts at ca. 235 °C]. Quenched 2* can be retained as metastable at room temp. for some weeks, whereas 3 is not quenchable. High-temperature PXD data show that 3 is cubic [a = 13.357(4) A at 225 °C; with strong rotational disorder of the molecules]. There are only minor variations in bond lengths and angles between 1 and 4 or from 100 to 295 K, and disorder is limited.