Triple Hydrogen Bonds Direct Crystal Engineering of Metal‐Assembled Complexes: The Effect of a Novel Organic–Inorganic Module on Supramolecular Structure

Abstract

Novel triply hydrogen bonded suprastructures based on [M(tdpd)2(L)2]2- (H2tdpd=1,4,5,6-tetrahydro-5,6-dioxo-2,3-pyrazinedicarbonitrile, L=solvent) and melamine-analogous cations have been synthesized and characterized. The use of anions containing two AAA sets from [M(tdpd)2(L)2]2- together with cations containing one DDD set (A=hydrogen-bond acceptor, D=hydrogen-bond donor) leads to the formation of complementary triply hydrogen bonded modules in the solid state. In all cases, the building module is further extended via additional hydrogen-bonding interactions to produce a tape, and tapes are assembled into sheets. These results show that a hydrogen-bonded module consisting of different kinds of building blocks, one of which is a metal complex that includes hydrogen-bond acceptor sites and the other is a hydrogen-bond donor molecule, will be attractive for constructing metal-containing supramolecular systems by the self-assembly technique.

Transition metal induced derivatisations resulting in novel coordination behaviour of bis(oxamato) ligands

“…for C 22 H 18 N 2 O 8 (438.2 g mol −1 ): C 60.27; H 4.15; N 6.39; Found C 60.50, H 4.05; N 6.43%. 1 H NMR: d = 1.32 (s, 6H, H 14,14 ), 4.32 (s, 4H, H 13,13 ), 7.91 (dd, 2H, H 6,7 ), 8.17 (dd, 2H, H 5,8 ), 8.43 (s, 2H, H 1,4 ), 10.76 (s, 2H, NH). 13 C{ 1 H} NMR: d = 14.1 (C 14,14 ), 63.0 (C 13,13 ), 123.7 (C 1,4 ), 126.9 (C 5,8 ), 130.7 (C 4a,9a ), 133.2 (C 8a,10a ), 134.7 (C 2,3,6,7 ), 156.1 (C 11,11 ), 159.9 (C 12,12 ), 181.6 (C 9,10 ).…”

A three-dimensional net of Δ-tris(1,10-phenanthroline)ruthenium(II) in the dual-metal self-assembly of bis[tris(1,10-phenanthroline)ruthenium(II)] tetraisothiocyanatoiron(II) bis(perchlorate)

“…Dual-metal compounds that comprise both coordination and inorganic metal complexes as cationic and anionic modules have a growing significance in the self-assembly of supramolecular architectures (Adachi et al, 2005;Luo et al, 2004). We have recently reported on helices of Ãand Á-[Ru II -(phen) 3 ] 2+ (phen is 1,10-phenanthroline) observed in the dualmetal self-assembly of racemic [Ru II (phen) 2À , where M is either Fe II or Co II (Ghazzali et al, 2008).…”

A 1:1 cocrystal of 4-(dimethylamino)benzaldehyde and 6-phenyl-1,3,5-triazine-2,4-diamine

“…The crystal structure of 6-phenyl-1,3,5-triazine-2,4-diamine has been reported (Diaz-Ortiz et al, 2004), as have a number of cocrystals (Deak, Radics et al, 2001;Bertolasi et al, 2001;Bishop et al, 2002), salts (Wijaya et al, 2004;Adachi et al, 2005;Sheshmani et al, 2006;Aghabozorg et al, 2006) and a metal complex in which is serves as a ligand (Dea  k, Ka  lma  n et al, 2001). In most cases, the two rings are approximately coplanar, usually with a small twist around the bond linking them, as is found in the title cocrystal, but torsion angles range up to 33 .…”