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Reaction of [Mn 2 (CO) 10 ] with 2-mercapto-1-methylimidazole in the presence of Me 3 NO at 25°C afforded two new dimanganese complexes [Mn 2 (CO) 6 (μ-SN 2 C 4 H 5 ) 2 ] (1) and [Mn 2 (CO) 7 (μ-SN 2 C 4 H 5 ) 2 ] (2). Compound 1 consists of two μ-SN 2 C 4 H 5 ligands, each bound through the sulfur atom to two Mn atoms and through the nitrogen atom to one Mn atom forming a four-membered chelate ring. Compound 2 was found to consist of one μ-SN 2 C 4 H 5 ligand in a similar bonding mode to 1 but another μ-SN 2 C 4 H 5 ligand coordinates through the sulfur atom to one Mn atom and through the nitrogen atom to another Mn atom. Compound 1 was also obtained as the only product from the reaction of [Mn 2 (CO) 8 (NCMe) 2 ] with 2-mercapto-1-methylimidazole. In contrast, a similar reaction of [Re 2 (CO) 8 (NCMe) 2 ] with 2-mercapto-1-methylimidazole led to the formation of the di-, tri-, and tetranuclear complexes [Re 3 (CO) 8 (μ-CO)(μ 3 -SN 2 C 4 H 5 ) 2 (μ-H)] (3), [Re 4 (CO) 12 (μ-SN 2 C 4 H 5 ) 4 ] (4), and [Re 2 (CO) 6 (μ-SN 2 C 4 H 5 ) 2 ] (5). Compound 3 provides a unique example of a hydrido trirhenium compound. The reaction of [Cr(CO) 3 (NCMe) 3 ] and

Reactions of the dirhenium and dimanganese complexes [Re2(CO)10−x(NCMe)x] (x = 0, 1, 2) and [Mn2(CO)10] with tri(2-thienyl)phosphine in different conditions are studied. A variety of mono-and dinuclear complexes are obtained from these reactions by C-P bond cleavage of the tri(2thienyl)phosphine ligand.

An analytical solution for the resonance condition of a piezoelectric quartz resonator with one surface in contact with a viscous conductive liquid is presented. The characteristic equation that describes the resonance condition and accounts for all interactions including acoustoelectric interactions with ions and dipoles in the solution is obtained in terms of the crystal and liquid parameters. A simple expression for the change in the resonance frequency is obtained. For viscous nonconductive solutions, the frequency change is reduced to a relationship in terms of the liquid density and viscosity. For dilute conductive liquid, the change in frequency is derived in terms of the solution conductivity and dielectric constant. The boundary conditions for the problem are defined with and without the electrical effects of electrodes. Experiments were conducted with various viscous and conductive chemical liquids using a fabricated miniature liquid flow cell containing an AT-cut quartz crystal resonator. The results, which show good agreement with the theory, on the use of quartz crystal resonators as conductivity and/or viscosity sensors are reported.