Poly[tetra-?-aqua-diaqua-tetra-kis-[?-(E)-2-nitro-cinnamato]tetra-rubidium].

ABSTRACT: In the structure of the title compound, [Rb(4)(C(9)H(6)NO(4))(4)(H(2)O)(6)](n), the asymmetric unit comprises four rubidium cations, two of which have an RbO(7) coordination polyhedron with a monocapped distorted octa-hedral stereochemistry and two of which have a distorted RbO(6) octa-hedral coordination. The bonding about both the seven-coordinate cations is similar, comprising one monodentate water mol-ecule together with three bridging water mol-ecules and three carboxyl-ate O-atom donors, two of which are bridging. The environments around the six-coordinate cations are also similar, comprising a monodentate nitro O-atom donor, a bridging water mol-ecule and four bridging carboxyl-ate O-atom donors [overall Rb-O range = 2.849?(2)-3.190?(2)?Å]. The coordination leads to a two-dimensional polymeric structure extending parallel to (001), which is stabilized by inter-layer water O-H?O hydrogen-bonding associations to water, carboxyl and nitro O-atom acceptors, together with weak inter-ring ?-? inter-actions [minimum ring centroid-centroid separation = 3.5319?(19)?Å].

SUBMITTER: Smith G 

PROVIDER: S-EPMC3247005 | biostudies-literature | 2011 Nov

REPOSITORIES: biostudies-literature