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η6‑Benzene(tricarbonyl)chromium and Cymantrene Assemblies Supported on an Organostannoxane Platform

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journal contribution
posted on 04.11.2015, 00:00 by Subrata Kundu, Vadapalli Chandrasekhar
A series of η6-benzene­(tricarbonyl)chromium and cymantrene-containing [cymantrene = cyclopentadienylmanganese­(I) tricarbonyl] assemblies supported on organostannoxane platforms are reported. The reaction of [Cr­(η6-C6H5CO2H)(CO)3] (L1H) with n-Bu2SnCl2 in a 1:1 ratio afforded the tetranuclear derivative [{n-Bu2Sn}23-O)­(μ-OMe)­(L1)]2 (1) whereas a similar reaction carried out in a 2:1 stoichiometry afforded the mononuclear derivative [n-Bu2Sn­(L1)2] (2). The reaction of (t-Bu2SnO)3 with L1H in toluene in a 1:3 ratio afforded the hydroxide-bridged dimer, [t-Bu2Sn­(μ-OH)­(L1)]2 (3). A 1:2 reaction between [{η6-C6H4(COOH)2-1,3}­Cr­(CO)3] (L2H2) and Me3SnCl afforded a two-dimensional coordination polymer [{Me3Sn}24-L2)]n (4). A similar reaction between [{η6-C6H4(COOH)2-1,4}­Cr­(CO)3] (L3H2) and Me3SnCl in a 1:2 ratio also afforded a two-dimensional coordination polymer [{Me3Sn}24-L3)]n (5). The reaction of L3H2 with Me3SnCl in the presence of 4,4′-bipyridine afforded a 1D-coordination polymer [(Me3Sn)2(μ-L3)­(μ-4,4′-bipy)]n (6). The reaction of L3H2 with (Ph3Sn)2O (in a 1:1 ratio) gave a dimer [(H2O)­SnPh3(μ-L3)­SnPh3(MeOH)] (7). The 1:1 reaction of [Mn­(η5-C5H4COOH)(CO)3] (L4H) with Me2SnCl2 yielded the tetranuclear derivative [{Me2Sn}23-O)­(L4)2]2 (8). A similar reaction of [Mn­{η5-C5H4C­(O)­CH2CH2COOH}­(CO)3] (L5H) with Me2SnCl2 in a 1:1 ratio also afforded a tetrameric derivative [{Me2Sn}23-O)­(μ2-OMe)­(L5)]2 (9). All the compounds were characterized by single crystal X-ray diffraction. Complexes 4 and 5 are planar organometallic 2D-coordination polymers.