New Imido-Bridged Transition Metal Clusters: [(C5H5)4Ti4(NSnMe3)4], [Co11(PPh3)3(NPh)12], [Ni11Br6(NtBu)8], and [Li(thf)4]4[Cu24(NPh)14] New Imido-Bridged Transition Metal Clusters:[(C5H5)4Ti4(NSnMe3)4],[Co11(PPh3)3(NPh)12],[Ni11Br6(NtBu)8], and[Li(thf)4]...