Preparation and structure of bis(tetraphenylarsonium) trans-aquatetracyanonitridotechnetate(V) pentahydrate. ESR studies of the [TcN(CN)4(OH2)]2−/[TcNCl4]− System

Tetraphenylphosphonium aquatetracyanonitridorhenate(V) pentahydrate

“…The bond distances and angles in the cations are all considered normal (Cambridge Structural Database;Version 5.27, August 2006 update;Allen, 2002). The Re-N bond distance of 1.6570 (19) Å and the Re-O bond distance of 2.4429 (15) Å in the anion compare well with those found in other complexes (Purcell et al, 1992), but are shorter than what was found in the isostructural Tc V complex where Tc-N and Tc-O distances of 1.596 (10) and 2.559 (9) Å , respectively, were reported (Baldas et al, 1990).…”

“…A number of kinetic and structural studies in the past few years have indicated that the isoelectronic [MX(H 2 O)-(CN) 4 ] nÀ complexes (M = Mo IV , W IV , Tc V , Re V and Os VI , and X = O 2À and N 3À ) are all relatively labile towards monodentate substitution reactions (Leipoldt et al, 1993;Damoense et al, 1994;van der Westhuizen et al, 2002;Mtshali et al, 2006). Our literature search (Cambridge Structural Database;November 2005, Version 5.27;Allen, 2002) revealed two isostructural systems for Re V and Tc V with tetraphenylarsonium as counter-ions and X = N 3À (Purcell et al, 1992, Britten et al, 1993Baldas et al, 1990). We report here the rhenium cyano structure but with tetraphenylphosphonium as the counter-ion.…”

Coordination pillared layers using a dinuclear Mn(V) complex as a secondary building unit

“…To modify the structures and functions, studies of new CPLs using other pillared building units with different bidentate pillar ligands and tetracyano complexes [53,54] are currently in progress.…”

Bis(tetraphenylphosphonium) tetracyanidonitridochromate(V) dihydrate

“…For related structures of nitridocyanidometalates, see: Baldas et al (1990); Bendix et al (1998Bendix et al ( , 2000; Britten et al (1993); Che et al (1989); Purcell et al (1991); van der Westhuizen et al (1994). For general background to Cr V nitrido complexes, see: Birk & Bendix (2003).…”

“…Symmetry codes: (i) Àx þ 2; Ày þ 1; Àz; (ii) Àx þ 2; Ày; Àz þ 1. (Baldas et al, 1990), rhenium (Britten et al, 1993;Purcell et al, 1991), osmium (Che et al, 1989;van der Westhuizen et al, 1994). We have previously reported the syntheses and crystal stuctures of six coordinated pentacyanidonitridometalates of chromate(V) and manganate(V) (Bendix et al, 2000) as well as the synthesis of the title compound and crystal structure of the isostructural manganese compound (Bendix et al, 1998).…”