1D and 2D network of ReO4− bonded azoimidazoles

2-Amino-3-nitropyridinium perrhenate

“…The atomic arrangement of this salt is an organized dispersion of oganic cations and inorganic anions which form alternate corrugated layers ( The ReO 4anion have an expected but slightly distorted tetrahedral geometry around Re atom with the Re-O bond lengths ranging from 1.665 (7) to 1.726 (6) Å and the O-Re-O bond angles ranging from 107.4 (4) to 113.4 (4)°. The average Re-O bond distances and O-Re-O bond angles are 1.701 Å and 109.45°, respectively, confirming a tetrahedral configuration, similar to other studied perrhenates (Ray et al, 2003;Ray et al, 2002). Nevertheless, the calculated average values of the distortion indices (Baur et al, 1974) of the related structure of 2-amino-3-nitropyridinium perchlorate (Toumi Akriche et al, 2010).…”

“…The ReO 4 -anion have an expected but slightly distorted tetrahedral geometry around Re atom with the Re-O bond lengths ranging from 1.665 (7) (Ray et al, 2003;Ray et al, 2002). (Akriche et al, 2000;Akriche et al, 2009), that well explain the distortion of XO 4 tetrahedra (X = P and Se) in which the P and Se atoms are displaced of 0.114 to 0.065 Å from gravity center of XO 4 .…”

“…For related structures containing 2-amino-3-nitropyridinium cations, see: Akriche & Rzaigui (2000; Toumi Akriche et al (2010). For related structures containing perrhenate anions, see: Rodrigues et al (2009); Ray et al (2002Ray et al ( , 2003. For distortion indices, see: Baur (1974).…”

“…These interactions are all important in the construction of atomic arrangement but short and multiple hydrogen-bonds observed in these frameworks appear to be the most exciting since they have been recognized as the steering force responsible for the formation of special networks (Katayev et al, 2006). The oxoanions are good hydrogen bond acceptors, that's why they have been employed in the purification, extraction and detection techniques of dangerous pollutants (Ray et al, 2003;Ray et al, 2002;Rodrigues et al, 2009). The 2-amino-3-nitropyridine molecule has a dual nature because of its donor and acceptor groups.…”

Molecular recognition of pertechnetate and perrhenate

“…2). 44,45 Separate from above, Jurisson and co-workers found that phosphinimine complexes of pertechnetate and perrhenate (2) exist as very stable ion pairs. 46 The phosphiniminium ion is not stable in aqueous solution, and undergoes hydrolysis to first phosphinimine and then to phosphine oxide; however, the complex with pertechnetate [Ph 3 PQNH 3 + ][TcO 4 À ] displayed very high stability in both aqueous and organic media.…”