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Nath P, Bharty MK, Gupta SK, Butcher RJ, Jasinski JP. (Benzylthiolato-κ S)phenylmercury(II). IUCRDATA 2017. [DOI: 10.1107/s241431461700503x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
The title complex, [Hg(C6H5)(C7H7S)], was synthesized from benzyl 4-methylpiperidine-1-carbodithioate. In the complex, the HgIIcation binds to a C atom of a phenyl ring and the S atom of a benzylthiolate ligand in a linear coordination geometry. The molecule is bent at the methylene C atom and the S atom, resulting in asynconformation with respect to the benzyl and phenyl rings. The dihedral angle between the phenyl and benzyl rings is 64.6 (2)°. The crystal structure is stabilized by intermolecular Hg...S [3.290 (3) Å] contacts and C—H...π interactions, generating a three-dimensional network.
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Bhattacharya A, Naskar JP, Majumder S, Ganguly R, Mitra P, Chowdhury S. New mixed ligand oxorhenium(V) complexes of 3-thiapentane-1,5-dithiolato with 2-thiocytosine and 5-amino-1,3,4-thiadiazole-2-thiol: Experiment and theory. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2014.10.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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De Montigny F, Bast R, Gomes ASP, Pilet G, Vanthuyne N, Roussel C, Guy L, Schwerdtfeger P, Saue T, Crassous J. Chiral oxorhenium(V) complexes as candidates for the experimental observation of molecular parity violation: a structural, synthetic and theoretical study. Phys Chem Chem Phys 2010; 12:8792-803. [PMID: 20532288 DOI: 10.1039/b925050f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
We report the synthesis and resolution of a series of new chiral "3 + 1" oxorhenium(V) complexes, designed for high-resolution laser spectroscopy experiments probing molecular parity-violation (PV) effects in the Re=O stretching mode frequency. These complexes display a particularly simple chemical structure, with the rhenium atom as the stereogenic center, and show large PV energy differences according to our calculations. They were obtained in the racemic and enantioenriched forms, in the latter case by using either semi-preparative chiral HPLC resolution or enantioselective synthesis. The vibrational transition frequency differences between the enantiomeric pairs due to PV have been calculated with two- and four-component relativistic Hamiltonians using Hartree-Fock (HF) and density functional theory (DFT). For three complexes, including one synthesized in enantioenriched form, our HF calculations predict frequency differences above the present resolution limit of 1 Hz. These results confirm the order of magnitude for the calculated HF PV vibrational frequency differences reported earlier for this class of compounds [P. Schwerdtfeger and R. Bast, J. Am. Chem. Soc., 2004, 126, 1652]. However, at the DFT level the PV vibrational frequency differences are in some cases reduced by an order of magnitude, but are still within the sensitivity of 0.01 Hz, which is the anticipated sensitivity in a new proposed experiment. We therefore believe that the present study represents an important step towards the experimental observation of PV in molecular systems, and emphasizes the extreme sensitivity of the PV vibrational frequency difference to the chemical environment around the rhenium center.
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Affiliation(s)
- Frederic De Montigny
- Ecole Nationale Supérieure de Chimie Paris UMR 7223, CNRS-ENSCP Paris Cedex 05, France
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De Montigny F, Guy L, Pilet G, Vanthuyne N, Roussel C, Lombardi R, Freedman TB, Nafie LA, Crassous J. Subtle chirality in oxo- and sulfidorhenium(v) complexes. Chem Commun (Camb) 2009:4841-3. [DOI: 10.1039/b907924f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Basak S, Rajak KK. Synthesis, Structure, and Spectroscopic Properties of Chiral Oxorhenium(V) Complexes Incorporating Polydentate Ligands Derived from l-Amino Acids: A Density Functional Theory/Time-Dependent Density Functional Theory Investigation. Inorg Chem 2008; 47:8813-22. [DOI: 10.1021/ic800764n] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sucharita Basak
- Inorganic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata, 700 032, India
| | - Kajal Krishna Rajak
- Inorganic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata, 700 032, India
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Novel oxorhenium(V) ‘3+1’ mixed ligand complexes with 3-thiapentane-1,5-dithiolate and functional mercaptobenzoyl amino acid ethyl ester. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2007.06.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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7
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Giglio J, Rey A, Cerecetto H, Pirmettis I, Papadopoulos M, León E, Monge A, López de Ceráin A, Azqueta A, González M, Fernández M, Paolino A, León A. Design and evaluation of “3 + 1” mixed ligand oxorhenium and oxotechnetium complexes bearing a nitroaromatic group with potential application in nuclear medicine oncology. Eur J Med Chem 2006; 41:1144-52. [PMID: 16782237 DOI: 10.1016/j.ejmech.2006.05.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 04/25/2006] [Accepted: 05/04/2006] [Indexed: 12/01/2022]
Abstract
The synthesis and evaluation of a series of oxotechnetium and oxorhenium complexes containing a nitroaromatic moiety as potential radiopharmaceuticals for targeting tumour hypoxia is presented. 99mTc labelling was performed in high yield (>85%) and radiochemical purity (>90%). Their structure was corroborated by means of the rhenium complexes. Reduction potentials were in the range for bioreducible compounds. 99mTc complexes III-VI were selected for "in vivo" experiments in view of the results of cytotoxicity studies. Biodistribution in normal animals was characterized by high initial blood, lung and liver uptake, fast blood and soft tissue depuration and preferential excretion via the hepatobiliary system. Initial tumour uptake was moderate but tumour/muscle ratios for complexes III and IV, were favourable at all time points. Although the results are encouraging further development is still necessary in order to achieve higher tumour uptake and lower gastrointestinal activity.
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Affiliation(s)
- J Giglio
- Cátedra de Radioquímica, Facultad de Química, General Flores 2124, 11800 Montevideo, Uruguay
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8
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Chowdhury S, Koshino N, Canlier A, Mizuoka K, Ikeda Y. Molecular structure and linkage isomerization of isothiocyanato(3-thiapentane-1,5-dithiolato)oxorhenium(V) complex. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2006.03.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Sigouin O, Reber C, Beauchamp AL. Oxo-rhenium(V) complexes containing bis(diphenylphosphino)ethane and catecholate ligands. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2006.01.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Sigouin O, Beauchamp AL. Oxo-rhenium(V) complexes with analogs of bis(diphenylphosphino)ethane. Inorganica Chim Acta 2005. [DOI: 10.1016/j.ica.2005.07.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Baril-Robert F, Beauchamp AL. Preparation and electronic properties of rhenium(V) complexes with bis(diphenyl phosphino)ethane. CAN J CHEM 2003. [DOI: 10.1139/v03-143] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Complexes of bis(diphenylphosphino)ethane (dppe) of the types ReOX3(dppe) and ReO(OR)X2(dppe) (with X= Cl or Br, and R = Me, Et, Pr, Ph, cyclohexyl (Cy), or -CH2CH2OH) were prepared to evaluate the influence of ligand changes on the low-energy dd transitions in these Re(V) low-spin d2 systems. Arylimido compounds Re(NR)Cl3(dppe) (with R = Ph and p-ClC6H4) were also obtained. X-ray diffraction studies on ReO(OPr)Cl2(dppe), ReO(OPh)Br2(dppe), and ReO(OCy)Cl2(dppe) confirmed the presence of the trans O=Re-OR unit and showed that the structural characteristics of the Re-O-R segment are not affected by the presence of a bulky cyclohexyl substituent or an aromatic phenyl group. The structure of the arylimido complex Re(p-ClC6H4N)Cl3(dppe) was also determined. The electronic absorption spectra of the ReOX3(dppe) compounds include two low-energy components at ~11 500 and ~16 000 cm1, assigned to the two spin-allowed dd transitions expected for these low-symmetry systems. Substitution of the oxo ligand by an arylimido group has little effect on the lower-energy component, but moves the two components closer together. Replacing the halogen trans to the Re=O bond by an alkoxo group shifts the whole system to higher energies. These variations were found to correlate well with the energies of the frontier orbitals determined from DFT calculations. While attempting to prepare ReOCl3(dppe) from ReOCl3(PPh3)2, the Re(III) compound fac-ReCl3(PPh3){Ph2PC2H4PPh2(O)} was obtained, in which one end of dppe had become a phosphine oxide. Upon standing in DMSO, this compound gave the octahedral compound ReCl4{Ph2PC2H4PPh2(O)}, in which the formation of a chelate ring involving a phosphine and a phosphine oxide was ascertained by X-ray diffraction.Key words: rhenium, crystal structure, DFT calculations, dd electron transitions.
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Duan XH, Lu GX, Wang XB. Synthesis and biodistribution of two novel 99mTc( SNN/S) "3+1" mixed ligand complexes as potential brain perfusion agents. Appl Radiat Isot 2003; 59:119-24. [PMID: 12941499 DOI: 10.1016/s0969-8043(03)00160-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Two novel [99mTc] [ SNN/S] "3+1" mixed ligand complexes, where L3H2= o-methylthio-glycinanilide (A) or N-(1-methylthio-phenyl)-ethylenediamine (B) and L1H= isopropanethiol, were synthesized using stannous chloride as reductant and glucoheptonate as transfer ligand. The identifications of [99mTc]-A and [99mTc]-B were established by thin layer chromatography. The radiochemical purity of both complexes was over 90%. The initial biodistribution study in mice demonstrated that both complexes can penetrate the intact blood-brain barrier and exhibit retention in mice brain. The brain uptake (%ID/g) values of [99mTc]-A were 1.68, 1.23, 1.24 and of [99mTc]-B were 1.76, 1.08, 0.90 at 2, 30 and 60 min i.v. postinjection, respectively.
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Affiliation(s)
- Xin-hong Duan
- College of Basic Science and Technology, Beijing Forestry University, Beijing 100083, China
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13
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Patsis G, Pirmettis I, Tsoukalas C, Pelecanou M, Raptopoulou CP, Terzis A, Papadopoulos M, Chiotellis E. Synthesis and characterization of binuclear μ-oxorhenium mixed ligand complexes containing tridentate (SNSEt) and monodentate (SR) ligands. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(02)01160-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Martín D, Piera C, Mazzi U, Rossin R, Solans X, Font-Bardia M, Suades J. Rhenium and technetium-99m complexes with coenzyme M (MESNA). Dalton Trans 2003. [DOI: 10.1039/b305042d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Palma E, Correia J, Domingos Â, Santos I. New Mixed-Ligand ReV Complexes with Bis(2-mercaptoethyl) Sulfide and Functionalized Thioimidazolyl Ligands. Eur J Inorg Chem 2002. [DOI: 10.1002/1099-0682(200209)2002:9<2402::aid-ejic2402>3.0.co;2-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Bouziotis P, Pirmettis I, Pelecanou M, Raptopoulou CP, Terzis A, Papadopoulos M, Chiotellis E. Novel oxorhenium and oxotechnetium complexes from an aminothiol[NS]/thiol[S] mixed-ligand system. Chemistry 2001; 7:3671-80. [PMID: 11575768 DOI: 10.1002/1521-3765(20010903)7:17<3671::aid-chem3671>3.0.co;2-l] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The simultaneous action of a bidentate aminothiol ligand, LnH, (n = 1: (CH3CH2)2NCH2CH2SH and n = 2: C5H10NCH2CH2SH) and a monodentate thiol ligand, LH (LH: p-methoxythiophenol) on a suitable MO (M = Re, 99gTc) precursor results in the formation of complexes of the general formula [MO(Ln)(L)3] (1, 2 for Re and 5. 6 for 99gTc). In solution these complexes gradually transform to [MO(Ln)(L)2] complexes (3, 4 for Re and 7, 8 for 99gTc). The transformation is much faster for oxotechnetium than for oxorhenium complexes. Complexes 1-4, 7, and 8 have been isolated and fully characterized by elemental analysis and spectroscopic methods. Detailed NMR assignments were made for complexes 3, 4, 7, and 8. X-ray studies have demonstrated that the coordination geometry around rhenium in complex 1 is square pyramidal (tau = 0.06), with four sulfur atoms (one from the L1H ligand and three from three molecules of p-methoxythiophenol) in the basal plane and the oxo group in the apical position. The L1H ligand acts as a monodentate ligand with the nitrogen atom being protonated and hydrogen bonded to the oxo group. The four thiols are deprotonated during complexation resulting in a complex with an overall charge of zero. The coordination geometry around rhenium in complex 4 is trigonally distorted square pyramidal (tau = 0.41), while in the oxotechnetium complex 7 it is square pyramidal (tau = 0.16). In both complexes LnH acts as a bidentate ligand. The NS donor atom set of the bidentate ligand and the two sulfur atoms of the two monodentate thiols define the basal plane, while the oxygen atom occupies the apical position. At the technetium tracer level (99mTc), both types of complexes, [99mTcO(Ln)(L)3] and [99mTcO(Ln)(L)2], are formed as indicated by HPLC. At high ligand concentrations the major complex is [99mTcO(Ln)(L)3], while at low concentrations the predominant complex is [99mTcO(Ln)(L)2]. The complexes [99mTcO(Ln)(L)3] transform to the stable complexes [99mTcO(Ln)(L)2]. This transformation is much faster in the absence of ligands. The complexes [99mTcO(Ln)(L)2] are stable, neutral, and also the predominant product of the reaction when low concentrations of ligands are used, a fact that is very important from the radiopharmaceutical point of view.
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Affiliation(s)
- P Bouziotis
- Institute of Radioisotopes-Radiodiagnostic Products, National Center for Scientific Research Demokritos, Athens, Greece
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Femia FJ, Chen X, Babich JW, Zubieta J. Synthesis and characterization of a ‘3+2’ {Re(V)O}3+ core complex carrying the ONS/PO donor atom set. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(01)00394-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Bandoli G, Dolmella A, Porchia M, Refosco F, Tisato F. Structural overview of technetium compounds (1993–1999). Coord Chem Rev 2001. [DOI: 10.1016/s0010-8545(00)00384-2] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Chen X, Femia FJ, Babich JW, Zubieta J. The syntheses and structures of '3+2' and '2+2+1' oxorhenium mixed-ligand complexes employing 8-hydroxy-5-nitroquinoline as the bidentate N,O donor ligand. Inorganica Chim Acta 2000; 308:80-90. [PMID: 20592939 PMCID: PMC2893356 DOI: 10.1016/s0020-1693(00)00218-8] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The syntheses and structural characterizations of a series of novel '3+2' and '2+2+1' mixed-ligand complexes carrying 8-hydroxy-5-nitroquinoline (HL) as the bidentate N,O donor atom system are reported. Thus one-pot reactions of [ReOCl(3)(PPh(3))(2)] with dianionic tridentate ligands H(2)L(n) (where H(2)L(1)=HOC(6)H(4)-2-CH=NC(6)H(4)-2-OH; H(2)L(2)=HOC(6)H(4)-2-CH=N-C(6)H(4)-2-SH; H(2)L(3)=HOC(6)H(4)-2-CH=NN=C(NHC(6)H(5))-SH; H(2)L(4)=2-CH(2)OH-C(5)H(3)N-6-CH(2)SH; and H(2)L(5)=2-CO(2)H-C(5)H(3)N-6-CO(2)H) and HL afforded a series of '3+2' oxorhenium complexes of the type [ReO(H(2)L(n))(L)] 2-6, which exhibit distorted octahedral geometries. Crystals of 1 are monoclinic space group C2/c, a=16.702(1), b=14.275(1), c=22.363(2) A, beta=108.083(1) degrees V=5068.2(7) A(beta) and Z=8; those of 2 are monoclinic space group P2(1)/n, a=8.5093(4) b=38.518(2), c=11.6092(5) A, beta=97.708(1) degrees , V=3770.7(3) A(3) and Z=8; those of 5 are triclinic, space group P1-, a=7.5899(8), b=10.322(1), c=11.905(1) A, alpha=78.636(2) degrees , beta=74.229(2) degrees , gamma=71.391(2) degrees , V=844.3(2) A(3), and Z=2. Upon reaction of 2,6-pyridinedimethanol (H(2)L(6)) with the intermediate complex [ReOCl(2)(L)(PPh(3))] (1), only one of the two methylene hydroxy group was deprotonated and a new '2+2+1' complex [ReO(OCH(3))(HL(6))(L)].CH(3)OH (7) was obtained. Crystal data for 7: monoclinic P2(1)/n, a=12.0579(6), b=11.0993(6), c=14.9262(8) A, beta=107.872(1) degrees , V=1901.2(2) A(3), and Z=8. In the preparation of complex 3, cleavage of the C=N bond of the Schiff base H(2)L(2) was observed and the '2+2+1' complex 8 [ReO(PPh(3))(eta(2)-NHC(6)H(4)-2-S)(L)].CH(2)Cl(2) having 2-aminothiophenol as a dianionic bidentate ligand was isolated. Crystals of 8 are monoclinic space group C2/c, a=25.627(2), b=8.1305(6) c=31.404(2) A beta=96.147(1) degrees , V=6505.7(8) A(3), and Z=8. Reduction of HL to 8-hydroxy-5-aminoquinoline was realized during the formation of complex 6, and a new complex 9 was thus isolated involving the coordination of two sets of N,O donor atoms from L and 8-hydroxy-5-aminoquinoline while a methoxy oxygen atom completes the octahedral coordination geometry. Crystals of 9 are monoclinic space group P2(1)/n, a=7.5330(6), b=15.095(1), c=16.394(1) A, beta=99.690(2) degrees , V=1837.7(3) A(3), and Z=4.
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Affiliation(s)
- Xiaoyuan Chen
- Department of Chemistry Syracuse University, Syracuse, NY 13244, USA
| | - Frank J. Femia
- Department of Chemistry Syracuse University, Syracuse, NY 13244, USA
| | - John W. Babich
- Biostream Inc., 160 Second Street Cambridge, MA 02142, USA
| | - Jon Zubieta
- Department of Chemistry Syracuse University, Syracuse, NY 13244, USA
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Chen X, Femia FJ, Babich JW, Zubieta J. Synthesis and characterization of oxorhenium(V)-'3+1' mixed thiolate [SNS]/[S] and [ONS]/[S] complexes. Crystal and molecular structures of [ReO(eta-SCH(2)C(5)H(3)NCH(2)S)(eta-C(6)H(4)Br-4-S)], [ReO(eta-SCH(2)C(5)H(3)NCH(2)O)(eta-C(6)H(4)X-4-S)] (X=Cl, OMe), [ReO(eta-SCH(2)C(5)H(3)NCH(2)O)(eta-C(6)H(4)OCH(3)-4-CH(2)S)] and [ReO(eta-SCH(2)C(5)H(3)NCH(2)S)(eta-C(5)H(4)NH-2-S)][Cl]. Inorganica Chim Acta 2000; 307:88-96. [PMID: 20592938 PMCID: PMC2893354 DOI: 10.1016/s0020-1693(00)00209-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The reaction of [ReOCl(3)(PPh(3))(2)] with the tridentate ligands 2,6-dithiomethylpyridine (4) or 6-thiomethyl-2-pyridinemethanol (5) and the appropriate monothiols, such as para-substituted benzenethiols (C(6)H(4)X-4-SH) (where X=F, Cl, Br and OCH(3)) and para-substituted benzylmercaptans (C(6)H(4)X-4-CH(2)SH) (where X=F, Cl and OCH(3)) in the presence of Et(3)N leads to the isolation of a series of integrated '3+1' oxorhenium(V) complexes. Similarly, reaction of [ReOCl(3)(PPh(3))(2)] with 2-mercaptopyridine and 4 afforded a cationic oxorhenium(V) complex, [ReO(eta(3)-SCH(2)C(5)H(3)NCH(2)S)(eta(1)-C(5)H(4)NH-2-S)][Cl] (22). Crystal data for 10, C(13)H(11)BrNOS(3)Re: triclinic, P1, a=7.2909(5), b=14.1978(9), c=15.991(1) A, alpha=77.184(1), beta=86.588(1), gamma=75.507(1) degrees , V=1562.69(18) A(3), Z=4. For 16, C(13)H(11)ClNO(2)S(2)Re: orthorhombic, P2(1)2(1)2(1), a=6.9728(6), b=13.477(1), c=15.761(1) A, V=1481.1(2) A(3), Z=4. For 18, C(14)H(14)NO(3)S(2)Re: monoclinic, P2(1)/c, a=15.6512(14), b=7.6678(7), c=13.732(1) A, beta=112.489(1) degrees , V=1522.7(2) A(3), Z=4. For 21, C(15)H(16)NO(3)S(2)Re: monoclinic, P2(1)/c, a=13.929(1), b=7.741(1), c=15.583(2) A, beta=103.600(2) degrees , V=1633.1(3) A(3), Z=4. For 22, C(12)H(11)ClN(2)OS(3)Re: monoclinic, C2(1)/(c), a=27.827(3), b=8.529(1), c=14.957(2) A, beta=119.314(2) degrees , V=3095.3(6) A(3), Z=8.
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Affiliation(s)
- Xiaoyuan Chen
- Department of Chemistry, Syracuse University, Syracuse, NY 13244, USA
| | - Frank J. Femia
- Department of Chemistry, Syracuse University, Syracuse, NY 13244, USA
| | - John W. Babich
- Biostream, Inc., 160 Second Street, Cambridge, MA 02142, USA
| | - Jon Zubieta
- Department of Chemistry, Syracuse University, Syracuse, NY 13244, USA
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Pelecanou M, Chryssou K, Stassinopoulou CI. Trends in NMR chemical shifts and ligand mobility of TcO(V) and ReO(V) complexes with aminothiols. J Inorg Biochem 2000; 79:347-51. [PMID: 10830887 DOI: 10.1016/s0162-0134(99)00227-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Detailed 1H and 13C NMR studies have been conducted in a series of oxotechnetium and oxorhenium complexes with aminothiol ligands ([SNS][S], [SNN][S], [SNNS]) designed as potential radiopharmaceuticals. The results of these studies in combination with others in the literature show that the oxometal core creates an anisotropic environment and affects the chemical shifts of the coordinated ligandbackbone in a consistent way. Protons oriented towards the oxygen appear deshielded relative to their geminals oriented away from the oxygen. In addition, the direction of a side chain (towards or away from the oxometal core) on the ligand backbone is shown to have a major effect on chemical shifts. The fluxional mobility of the ligand in complexes of the [SNS][S] type was also studied by NMR and the free energy of activation delta G(C)double dagger for the conformational inversion of the ligand was calculated from the temperature dependence of the carbon chemical shifts. delta G(C)double dagger was found to depend on the orientation of the side chain present on the coordinated nitrogen. The energy barrier for the inversion is larger for the oxorhenium complexes than for the analogous oxotechnetium complexes.
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Affiliation(s)
- M Pelecanou
- Institute of Biology, NCSR Demokritos, Athens, Greece.
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Papadopoulos M, Pirmettis I, Tsoukalas C, Nock B, Maina T, Raptopoulou CP, Pietzsch HJ, Friebe M, Spies H, Johannsen B, Chiotellis E. Study on the formation of mixed ligand oxorhenium and oxotechnetium complexes (SNS/S combination). Inorganica Chim Acta 1999. [DOI: 10.1016/s0020-1693(99)00262-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Liu S, Edwards DS. 99mTc-Labeled Small Peptides as Diagnostic Radiopharmaceuticals. Chem Rev 1999; 99:2235-68. [PMID: 11749481 DOI: 10.1021/cr980436l] [Citation(s) in RCA: 371] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S Liu
- DuPont Pharmaceuticals Company, Medical Imaging Division, 331 Treble Cove Road, North Billerica, Massachusetts 01862
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Pelecanou M, Pirmettis I, Papadopoulos M, Raptopoulou C, Terzis A, Chiotellis E, Stassinopoulou C. Structural studies of ReO(V) mixed ligand [SNS][Cl] and [SNS][S] complexes. Inorganica Chim Acta 1999. [DOI: 10.1016/s0020-1693(98)00422-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Papadopoulos M, Tsoukalas C, Pirmettis I, Nock B, Maina T, Abedin Z, Raptopoulou CP, Terzis A, Chiotellis E. Synthesis and characterization of five-coordinate rhenium(V) and technetium(V) mixed ligand bifunctional complexes carrying the SNS/S or the SNN/S donor atom set. Crystal structure of ReO{[(C2H5)2NCH2CH2N(CH2CH2S)2](p-H2N–PhS)} and ReO{[(CH2)4NCH2CH2NCH2CH2S](p-H2N–PhS)}. Inorganica Chim Acta 1999. [DOI: 10.1016/s0020-1693(98)00330-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Pelecanou M, Pirmettis I, Nock B, Papadopoulos M, Chiotellis E, Stassinopoulou C. Interaction of [ReO(SNS) (S)] and [99mTcO(SNS) (S)] mixed ligand complexes with glutathione: isolation and characterization of the product. Inorganica Chim Acta 1998. [DOI: 10.1016/s0020-1693(98)00159-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Expansion of the ‘3 + 1’ concept of oxorhenium-thiolate chemistry to cationic and binuclear complexes. INORG CHEM COMMUN 1998. [DOI: 10.1016/s1387-7003(98)00056-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Synthesis and structural characterization of the [2,9-dimethyl-4,7-diaza-2,9-decanedithiolato]oxorhenium(V) complex. Inorganica Chim Acta 1998. [DOI: 10.1016/s0020-1693(97)05727-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Papadopoulos MS, Pirmettis IC, Pelecanou M, Raptopoulou CP, Terzis A, Stassinopoulou CI, Chiotellis E. Syn-Anti Isomerism in a Mixed-Ligand Oxorhenium Complex, ReO[SN(R)S][S]. Inorg Chem 1996; 35:7377-7383. [PMID: 11666932 DOI: 10.1021/ic9604167] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The simultaneous action of the tridentate ligand (C(2)H(5))(2)NCH(2)CH(2)N(CH(2)CH(2)SH)(2) and the monodentate coligand HSC(6)H(4)OCH(3) on a suitable ReO(3+) precursor results in a mixture of syn- and anti-oxorhenium complexes, ReO[(C(2)H(5))(2)NCH(2)CH(2)N(CH(2)CH(2)S)(2)] [SC(6)H(4)OCH(3)], in a ratio of 25/1. The complexes are prepared by a ligand exchange reaction using ReO(eg)(2) (eg = ethylene glycol), ReOCl(3)(PPh(3))(2), or Re(V)-citrate as precursor. Both complexes have been characterized by elemental analysis, FT-IR, UV-vis, X-ray crystallography, and NMR spectroscopy. The syn isomer C(17)H(29)N(2)O(2)S(3)Re crystallizes in the monoclinic space group P2(1)/n, a = 14.109(4) Å, b = 7.518(2) Å, c = 20.900(5) Å, beta = 103.07(1) degrees, V = 2159.4(9) Å(3), Z = 4. The anti isomer C(17)H(29)N(2)O(2)S(3)Re crystallizes in P2(1)/n, a = 9.3850(7) Å, b = 27.979(2) Å, c = 8.3648(6) Å, beta = 99.86(1) degrees, V = 2163.9(3) Å(3), Z = 4. Complete NMR studies show that the orientation of the N substituent chain with respect to the Re=O core greatly influences the observed chemical shifts. Complexes were also prepared at the tracer ((186)Re) level by using (186)Re-citrate as precursor. Corroboration of the structure at tracer level was achieved by comparative HPLC studies.
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Affiliation(s)
- M. S. Papadopoulos
- Institutes of Radioisotopes-Radiodiagnostic Products, Biology, and Materials Science, NCSR "Demokritos", POB 60228, 15310, Aghia Paraskevi, Athens, Greece
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