cis-Aquabis(2,2′-bipyridine-κ²N,N′)fluoridochromium(III) bis(perchlorate) dihydrate

Abstract

m122 Birk and Bendix [CrF(C 10 H 8 N 2) 2 (H 2 O)](ClO 4) 2 Á2H 2 O Acta Cryst. (2010). E66, m121-m122 supporting information sup-1

Crystal structure ofcis-aquabis(2,2′-bipyridine-κ2N,N′)chloridochromium(III) tetrachloridozincate determined from synchrotron data

“…The Cr-Cl and Cr-(OH 2 ) bond lengths in (I) are 2.2732 (6) and 1.9876 (12) Å , respectively. The latter is comparable to the values of 1.99 (1), 1.9579 (10) and 1.996 (4) Å found in cis-[Cr(bipy) 2 (H 2 O) 2 ](NO 3 ) 3 (Casellato et al, 1986) (Birk & Bendix, 2010) and trans-[CrF(3,2,3-tet)(H 2 O)](ClO 4 ) 2 ÁH 2 O (3,2,3-tet = 1,5,8,12-tetraazaundecane) (Choi & Lee, 2008), respectively. The Cr-Cl bond length in (I), however, is slightly shorter than those with 2.289 (9), 2.2941 (15) and 2.3253 (7) Å in cis-[CrCl 2 (bipy) 2 ]-(Cl) 0.38 (PF 6 ) 0.62 (Kar et al, 2006), cis-[CrCl 2 (phen) 2 ]Cl (Gao, 2011) and trans-[CrCl 2 (Me 2 tn) 2 ]Cl (Me 2 tn = 2,2-dimethylpropane-1,3-diamine) (Choi et al, 2007), respectively.…”

Medium and high oxidation state metal/non-metal fluoride and oxide–fluoride complexes with neutral donor ligands

“…[170][171][172][173] cis-[Cr(LÀL) 2 F 2 ] + (LÀL = 2,2 0 -bipy, 1,10phen), cis-[Cr(2,2 0 -bipy) 2 (H 2 O)F] 2+ and [Cr(2,2 0 -bipy)(H 2 O)F 3 ] form with the diimines. 172,[174][175][176][177][178] Examples of fac and mer isomers with tridentate N-bases are fac-[Cr(tacn)F 3 ], 169 170,182 Difluorochromium(III) complexes of the tetradentate macrocycle [15]aneN 4 and of two constrained cyclam (1,4-C 2 -and 1,11-C 3 -cyclam) derivatives have been prepared, their structures determined, and their spectroscopic properties probed in detail. 183,184 An unexpected recent result is the observation that the presence of Na + or Li + cations in solutions of chromium fluoride complexes leads to hypsochromic shifts in the visible spectra, and crystallisation from such solutions affords compounds with the Na + or Li + ion coordinated to the chromium-bound fluoride ligands, e.g.…”

Crystal structure ofcis-aquachloridobis(1,10-phenanthroline-κ2N,N′)chromium(III) tetrachloridozincate monohydrate from synchrotron data

“…The Cr-Cl and Cr-(OH 2 ) bond lengths in (I) are 2.2734 (7) and 1.9986 (17) Å , respectively. The Cr-(OH 2 ) bond length is comparable to those of 1.947 (4), 1.9579 (10) and 1.996 (Birk & Bendix, 2010) and trans-[CrF(3,2,3-tet)(H 2 O)](ClO 4 ) 2 ÁH 2 O (3,2,3-tet = 1,5,8,12-tetraazaundecane) (Choi & Lee, 2008), respectively. The Cr-Cl bond length in (I) is somewhat shorter than those of 2.2941 (15) and 2.3253 (7) Å found in cis-[CrCl 2 (phen) 2 ]Cl (Gao, 2011) or trans-[Cr(Me 2 tn) 2 Cl 2 ]Cl (Me 2 tn = 2,2-dimethylpropane-1,3-diamine) (Choi et al, 2007), respectively.…”