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A novel binuclear complex [Cu2 (PPh3)2 (µ-OOCH)](ClO4)(II)was synthesized via the interaction of carbon dioxide with [Cu(PPh3)2(BH4)] (I) in the presence of PPh3 and NBu4 (ClO4). It was characterized by elemental analysis and spectroscopic methods as well as by single-crystal X-ray diffraction. Crystals are monoclinic, space group C2/c , with a = 25.911(5), b = 13.6361(3), c = 26.929(5)Å, β = 90.21(3), V = 9323.1(3)Å3, Z = 8 and Dc = 1.314 g cm-3. The formate ligand of II in the solid state displays a near-perfect linear coordination mode as CO2 and serves as a bridge for the two Cu(PPh3)3 units with the O-C-O bond angle being 180.0(5)°. A mechanism involving carbon dioxide insertion into the Cu-H bond of [Cu(PPh3)3(BH4)] (I) for the formation of II is proposed. [ABSTRACT FROM AUTHOR]

Background: The ameloblastoma is the most common odontogenic epithelial tumor, which belong to benign neoplasms that present a painless course, and usually occur in the oromaxillo-facial region. Although the histopathological manifestation of ameloblastoma is benign, it has unique biological behavior, for example local invasion and recurrence repeatedly. A few case of ameloblastoma was locally aggressive growth, and rarely metastasis to other tissue, for example the lungs, lymph nodes, and spine., Case Report: A 64-year-old Chinese man, diagnosed with metastatic ameloblastoma, was treated with palliative chemotherapy consisting of cyclophosphamide, doxorubicin, and cisplatin for six cycles, and radiotherapy for 50 Gy after the last cycle chemotherapy. During the surveillance CT scan after the therapy, the tissues of the tumor were nearly complete response., Conclusion: The purpose of this study was to report a case of a patient with a right mandible ameloblastoma that recurred repeatedly and metastasized into bilateral lung. After the chemotherapy and radiotherapy, the tissues of the tumor were nearly complete response. This case is interesting because it investigated the diagnosis and treatment of the malignancy ameloblastoma, as this may help diagnose and treatment for clinician to the metastatic ameloblastoma.

The Bis (diphenylphosphino) alkane series ligands and its series of complexes formed from Cu(BF4)2 and Cu(C3H7COO)2 respectively were studied by infrared spectral analysis. This paper discusses the spectral classification and the change regularity of related spectra before and after the Cu(I) complexes were formed. The possible structure model of the formed complexes was discussed, based on the element analysis, powder X-ray diffraction analysis, and thermal gravity analysis.