208. Chloromolybdenum(II) compounds

Abstract

X-Ray diffraction studies have shown that molybdenum(r1) chloride derivatives contain the octachlorohexamolybdenum(11) group, (Mo,C1,)4+, which acts as a centre for octahedral complexes analogously to a single-atom ion.', Preparative work, cryoscopy, molecular conductivity, ultraviolet spectroscopy, and magnetic susceptibility support the octahedral co-ordination of this group. The existence of [(Mo6C18)XJ-(X = C1, Br, I, or OH) ions in solution have been demonstrated. These complexes are starting materials in the preparation of compounds (Mo,Cl,) X, which are considered to be polymeric. Evidence is given for the existence of octahedral complexes [(Mo,C18)C1,,2C,H,N], [(Mo6CI,)C1,,2NEt3], [(Mo,C1,) (OH),,2H20], and [(Mo,C1,)C13*OH,2H,0]. The stability, ultraviolet spectra, and diamagnetism of Mo,Cl, compounds, and the co-ordination number nine for each molybdenum atom,l* can be explained by regarding molybdenum as sexivalent in chloromolybdenum(I1).

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“…EXECUTIVE SUMMARY Approximately 2 grams of Mo 6 Cl 12 was prepared using the method of Sheldon and coworkers [6]. The absorption, emission, and x-ray powder diffraction results of the new material are similar to that of our previous preparation.…”

“…The emission spectra of the current Mo 6 Cl 12 compound dissolved in 6 M HCl compared with previous results from Ghosh [4] 13 Figure 7. The emission spectra of the current Mo 6 Cl 12 compound prior to thermal cycling in air and 0.001% oxygen Figure 8. The emission spectra of the current Mo 6 Cl 12 compound after cycling at 200 C in air and 0.001% oxygen…”

“…The emission spectra of the current Mo 6 Cl 12 compound prior to thermal cycling in air and 0.001% oxygen Figure 8. The emission spectra of the current Mo 6 Cl 12 compound after cycling at 200 C in air and 0.001% oxygen…”

“…The change in the luminosity of Mo 6 Cl 12 as a function of temperature, as defined from the mean luminosity measurements of images analyzed using Adobe Photoshop. Four independent runs are shown.…”

Fiber Optical Micro-Detectors for Oxygen Sensing in Power Plants

“…Molybdenum dichloride (Cerac, Inc.) was purified as described elsewhere. [7] The acetonitrile complex of Mo 6 Cl 12 was prepared by placing dry, purified Mo 6 Cl 12 (100 mg) into a cellulose Soxhlet extraction thimble. After assembling the Soxhlet apparatus and flushing the system with nitrogen, the Mo 6 Cl 12 was extracted with 250 mL of dry acetonitrile for one week.…”