Closed bridge

Dppf is commonly seen in its chelating or bridging state. Of special interest is the quasi-closed bridging system of dppf complexes, Re2(/r-OMe)2(CO)6(/r-dppf) [33] and Rh2(yU-S-tBu)2(CO)2(/r-dppf), 2 [34], in which the sterically demanding dppf ligand coexists with two bridging ligands of much smaller size. Comparison of the... 

Ag2(A -C6H5C02)2(/t-dppl) quasi-closed bridge anticlinal (staggered) —... 

Rh2 (/2-S- Bu)2 (C0)2 (/2-dppf) quasi-closed bridge gauche eclipsed 72... 

Ag2(/t-CH3C02)(/t3-CH3C02)(/t-dppf)]2 quasi-closed bridge gauche eclipsed 88.8... 

Rej (/t-OMe)2 (CO)6(/t-dppf) quasi-closed bridge gauche eclipsed 85.9(5)... 

Dppf is commonly seen in its chelating or bridging state. Of special interest is the quasi-closed bridging system of dppf complexes, Re2( -OMe)2(CO)6(/r-dppf)... 

Fe3(/i3-S)2(CO)2(/r-dppf) quasi-closed bridge gauched eclipsed 80.4(5)... 

Reliable modal information can be obtained by output-only dynamic measurements, i.e. accelerations are dne to ambient influences. In the case of bridges, traffic under or on top of the bridge, besides wind pressures can be the cause of the induced vibrations. So closing bridges to apply controlled force excitation is not necessary. This makes ambient vibration monitoring suitable for continuous condition assessment. 

Solutions and Reagents. Solutions of 0.1 M HCIO4 (EM Science, Suprapur) were made up with pyrolytically triply distilled water. 0.1 M KBr (Baker, Ultrex) and Cu + (from CuO, Aldrich, Puratronic) were injected into supporting electrolytes to the desired concentrations. All potentials are referenced to a normal calomel electrode (NCE), the potential of which is +0.268 V versus a standard hydrogen electrode [19]. A closed bridge was placed between the NCE reference electrode and the cell to prevent Cf contamination. 

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