2006
DOI: 10.1007/s11172-006-0214-2
|View full text |Cite
|
Sign up to set email alerts
|

Rhenium(IV) and rhenium(V) complexes with 3,5-dimethylpyrazole

Abstract: Mono and dinuclear Re IV and Re V complexes with 3,5 dimethylpyrazole (Me 2 pzH) were synthesized. The cis [Re 2 O 3 Cl 4 (3,5 Me 2 pzH) 4 ] complex (cis 1) was prepared by the reaction of NH 4 ReO 4 with K[HB(Me 2 pz) 3 ] in concentrated HCl or by refluxing of [ReCl 3 (MeCN)(PPh 3 ) 2 ] with Me 2 pzH in air. The bromide complex trans [Re 2 O 3 Br 4 (3,5 Me 2 pzH) 4 ] (trans 2) was synthesized by passing dry HBr through a solution of [Re 2 O 3 Br 2 (µ 3,5 Me 2 pz) 2 (3,5 Me 2 pzH) 2 ] (4) in chloroform. The py… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1
1

Citation Types

1
4
0

Year Published

2008
2008
2020
2020

Publication Types

Select...
6
1

Relationship

0
7

Authors

Journals

citations
Cited by 8 publications
(5 citation statements)
references
References 39 publications
1
4
0
Order By: Relevance
“…The Re-μ-oxo (1.838 Å) bond distance is slightly longer than normal ranges for Re(V) complexes 13,19,21,25,28 and shorter than dinuclear Re(IV) complexes with bridging ligands other than an oxo moiety. 33,34,62 The Re-NCS bond distance of 2.13 (1) is longer than average literature values but still falls within the reported range albeit literature values are from mixed metal complexes and NCS saturated Re coordination environments. 53,54,[63][64][65] Experimental section…”
Section: Cis-[reo(ncs)(sal 2 Ibn)] (3)supporting
confidence: 55%
See 1 more Smart Citation
“…The Re-μ-oxo (1.838 Å) bond distance is slightly longer than normal ranges for Re(V) complexes 13,19,21,25,28 and shorter than dinuclear Re(IV) complexes with bridging ligands other than an oxo moiety. 33,34,62 The Re-NCS bond distance of 2.13 (1) is longer than average literature values but still falls within the reported range albeit literature values are from mixed metal complexes and NCS saturated Re coordination environments. 53,54,[63][64][65] Experimental section…”
Section: Cis-[reo(ncs)(sal 2 Ibn)] (3)supporting
confidence: 55%
“…Of the rare Re(IV) dinuclear complexes, this unusual compound is the first to not have terminal oxo groups, but rather thiocyanate ligands trans to the bridging oxo. 33, 34, 62 As in 4 , the thiocyanate ligands are near linear with N–C–S bond angles of 175.79°, the Re–NCS bond length (2.151 Å) is slightly longer than typically observed, and the Re–NCS bond angle (Re–N–C) deviates from linear (163.64°). 22, 56, 63, 64 The two sal 2 ibn ligands are positioned with the backbone methyl groups on opposite sides as in 2 .…”
Section: Resultsmentioning
confidence: 68%
“…The structures were solved, using the WINGX package, 51 by direct methods SHELXS-97 52 and refined by least-squares against F 2 (SHELXL-97). 52 All non-hydrogen atoms were anisotropically refined except for C (21) and C (31) in 1, which are disordered in 3-and 2-positions, respectively. This compound showed some degree of twinning.…”
Section: General Considerationsmentioning
confidence: 99%
“…Regarding 3,5-disubstituted-pyrazolato-oxo or hydroxo complexes, there are some examples in the literature of polynuclear transition metal species bearing two 3,5-disubstituted-pyrazolatom-oxo 21,22 or in some cases, two 3,5-disubstituted-pyrazolato-mhydroxo 23-29 ligands bridging at least two metals. To the best of our knowledge, there are no reports in the literature of dinuclear or tetranuclear group 4 complexes containing dimethylamido-3, 5-dimethylpyrazolato or polyoxo-dimethylamido-3,5-dimethylpyrazolato ligands in which the dimethylamido and 3,5-dimethylpyrazolato ligands appear both as terminal and/or bridging in the same molecule.…”
Section: Introductionmentioning
confidence: 99%
“…These compounds are important from the standpoint of catalysis, biological mimicry, multi electron-transfer reactions and metal-metal interactions [10][11][12]. Since the pioneering works of Johnson et al [13,14], some dinuclear rhenium complexes containing linear or bent Re 2 O 3 unit with aromatic N-donor ligands, such as pyridine, pyrazine, pyrimidine, 3,5-lutidine, 1,5,6-trimethylbenzimidazole, have been investigated structurally, spectroscopically and electrochemically [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30].Furthermore, the radioisotopes 186 Re (1.07 MeV β-emitter, t1/ 2 90 h) and 188 Re (2.12 MeV β-emitter, t 1/2 17 h) are two of the most attractive isotopes for applications in targeted radionuclide therapy [31]. Although kit preparations for the imaging of almost all main organs and organ systems exist and there is some experience in the labeling of biomolecules, there is still a need for new approaches and new labeling procedures.…”
mentioning
confidence: 99%