Molecular structures of cis-bis-isothiocyanato bis-2,2′-bipyridyl manganese II and cobalt II

cis-Bis(dicyanamido)bis(1,10-phenanthroline)manganese(II) andcis-bis(dicyanamido)bis(1,10-phenanthroline)zinc(II)

“…; 2.179 (2)±2.233 (2) A Ê ; Batten et al, 1999], in which dca acts as a bridging ligand to connect two Mn cations. The four MnÐ N(phen) distances [2.257 (2)±2.319 (2) A Ê ] are similar to the corresponding distances in [Mn(phen) 2 (NCS) 2 ] (Holleman et al, 1994), [Mn(2,2 H -bipy) 2 (NCS) 2 ] (Veidis et al, 1981) and [Mn(dca) 2 (2,2 H -bipy)] (Manson et al, 1999). But unlike [Mn(phen) 2 (NCS) 2 ] (Holleman et al, 1994), in which the four MnÐN(phen) bond distances show no signi®cant difference, in (I), the four MnÐN(phen) bonds can be obviously divided into two groups, i.e.…”

“…The two longer MnÐN(phen) bonds are trans to the dca ligands. In cis-[Mn(2,2 H -bpy) 2 (NCS) 2 ] (Veidis et al, 1981) and cis-[Mn(2,2 H -bipy) 2 Cl 2 ] (Lumme & Lindell, 1988), the same effect is observed. The zinc complex, (II), shows a similar case.…”

“…In complex (I), the two shorter MnÐN(dca) distances [2.144 (2) and 2.151 (2) A Ê ] are comparable to the MnÐ N(NCS) distances in the monomeric complexes [Mn(phen) 2 (NCS) 2 ] (Holleman et al, 1994) and [Mn(2,2 Hbipy) 2 (NCS) 2 ] (Veidis et al, 1981), while typically ca 0.05 A Ê shorter than those MnÐN(dca) distances in MnÐdca complexes with an extended structure, such as [Mn(dca) 2 L] [L is a pyridine-type ligand; 2.187 (6)±2.258 (3) A Ê ; Manson et al, 1999] and [Mn(dca) 2 L 2 ] [L = DMF, CH 3 CH 2 OH etc. ; 2.179 (2)±2.233 (2) A Ê ; Batten et al, 1999], in which dca acts as a bridging ligand to connect two Mn cations.…”

Structures of tetrakis(4-benzoylpyridine)bis(isothiocyanato)cobalt(II) (1) and bis(4-acetylpyridine)diaquabis(isothiocyanato)cobalt(II) (2)

“…Similar values are also found in bis(iso-c(37) 0(38) thiocyanato)tetrakis(4-vinylpyridine)cobalt(II); for the C(39) orthorhombic form (Foxman & Mazurek, 1982), c(40) Co--N(CS) is 2.100, 2.049 J~ and Co--N(py) 2.197, c(41) C(42) 2.169, 2-186, 2.147/~ and in the tetragonal form, C(43) where the molecule is centrosymmetric (Andreetti & c(44) Sgarabotto, 1972), unique values are 2.086/~, for Co--N(CS) and 2.170, 2.206A for Co-N(py). In cis-bis(2,2'-bipyridyl)bis(isothiocyanato)cobalt(II) (Veidis, Dockum, Charron, Reiff & Brennan, 1981), dimensions are Co-N(CS) 2.063, 2.075 A and Co-N(bpy) 2.155, 2.191, 2.157, 2.149A. In diaquabis (isothiocyanato)bis(nicotinamide)cobalt (Tsintsadze, Dzhavakhishvili, Amiraslanov & Kvitashvili, 1979) bond lengths are Co-O 2.120, 2.085 A, Co-N(CS) 2.…”

Synthesis and Crystal Structure of Manganese(II) Bipyridine Carboxylato Complexes: [(bipy)2MnII(μ-C2H5CO2)2MnII(bipy)2](ClO4)2 and [MnII(ClCH2CO2)(H2O)(bipy)2]ClO4 · H2O (bipy = 2,2′-bipyridine)

“…1. Cis-arrangement and bite angle are as seen e. g. in [Mn(N 3 ) 2 (5,5'-diaminobipy) 2 ] [22] and in [Mn(NCS) 2 (bipy) 2 ] [23]. The two metal atoms are bridged by two propionato groups.…”