451
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Dekker J, Boersma J, Fernholt L, Haaland A, Spek AL. Molecular structures of bis[3-(dimethylamino)propyl]zinc, Zn[(CH2)3N(CH3)2]2, by x-ray and gas electron diffraction and bis[3-(methylthio)propyl]zinc, Zn[(CH2)3SCH3]2, by gas electron diffraction. Organometallics 2002. [DOI: 10.1021/om00149a013] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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452
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Maassarani F, Pfeffer M, Spek AL, Schreurs AMM, Van Koten G. Reactivity of mixed cyclometalated palladium compounds containing the [2-Me2NC6H4C(H)SiMe3] monoanion. Part 2. Transmetalation reaction and formation of a novel .mu.-alkylidene compound (x-ray) bis(.mu.-chloro)bis{.mu.-C,.sigma.-N-[2-(dimethylamino)benzylidene](.mu.-chloro)(diethyl sulfide)dipalladium(II)}. J Am Chem Soc 2002. [DOI: 10.1021/ja00274a061] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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453
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Gerli A, Reedijk J, Lakin MT, Spek AL. Redox Properties and Electrocatalytic Activity of the Oxo/Aqua System [Ru(terpy)(bpz)(O)]2+/[Ru(terpy)(bpz)(H2O)]2+. X-ray Crystal Structure of [Ru(terpy)(bpz)Cl]PF6.cntdot.MeCN (terpy = 2,2',2''-Terpyridine; bpz = 2,2'-Bipyrazine). Inorg Chem 2002. [DOI: 10.1021/ic00111a035] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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454
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Markies PR, Akkerman OS, Bickelhaupt F, Smeets WJJ, Spek AL. Crown ether Grignard reagents; x-ray structure of 2-(bromomagnesio)-1,3-xylyl-15-crown-4. J Am Chem Soc 2002. [DOI: 10.1021/ja00221a030] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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455
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Tinga MAGM, Schat G, Akkerman OS, Bickelhaupt F, Horn E, Kooijman H, Smeets WJJ, Spek AL. Synthesis of cyclic bifunctional organomagnesium compounds. X-ray crystal structures of tetrameric organomagnesium clusters. J Am Chem Soc 2002. [DOI: 10.1021/ja00060a030] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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456
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van der Schaaf PA, Boersma J, Smeets WJJ, Spek AL, van Koten G. Mononuclear tungsten(VI) phenylimido phenoxide and alkoxide complexes with intramolecular amine coordination: molecular structure of WCl3(=NPh)[OC6H2(CH2NMe2)2-2,6-Me-4]. Inorg Chem 2002. [DOI: 10.1021/ic00075a028] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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457
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Beers OCP, Bouman MM, Komen AE, Vrieze K, Elsevier CJ, Horn E, Spek AL. Reactions of monoaza dienes with metal carbonyl complexes. 15. Heteronuclear monoaza dienyl complexes, isolobally related to cyclopentadienyl compounds. Organometallics 2002. [DOI: 10.1021/om00026a017] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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458
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Edema JJH, Gambarotta S, Van der Sluis P, Smeets WJJ, Spek AL. Preparation and x-ray structure of (tetramethyldibenzotetraaza[14]annulene)chromium dimer [(tmtaa)Cr]2. A multiply bonded complex of dichromium(II) without bridging ligands. Inorg Chem 2002. [DOI: 10.1021/ic00319a005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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459
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Janssen MD, Herres M, Zsolnai L, Grove DM, Spek AL, Lang H, van Koten G. A Stable Bimetallic Copper(I) Titanium Acetylide. Organometallics 2002. [DOI: 10.1021/om00003a008] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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460
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Wielstra Y, Gambarotta S, Spek AL, Smeets WJJ. Binuclear zirconium(III) and zirconium(IV) complexes: mild oxidation of low-valent zirconium as a synthetic pathway to a class of tri- and tetravalent zirconium fulvalene complexes. Molecular structures of [.eta.5:.eta.5-C10H8][CpZrSPh]2, [.eta.5:.eta.5-C10H8][CpZr(CH3)2]2, and [.eta.5:.eta.5-C10H8][CpZr]2[.mu.-S]2. Organometallics 2002. [DOI: 10.1021/om00157a027] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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461
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Hessen B, Buijink JKF, Meetsma A, Teuben JH, Helgesson G, Haakansson M, Jagner S, Spek AL. .alpha.-, .beta.-, and .delta.-Hydrogen abstraction in the thermolysis of paramagnetic vanadium(III) dialkyl complexes. Organometallics 2002. [DOI: 10.1021/om00030a042] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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462
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van der Schaaf PA, Sutter JP, Grellier M, van Mier GPM, Spek AL, van Koten G, Pfeffer M. Palladium-Mediated Intramolecular C-N Bond Formation between Tertiary Amines and Alkenes. J Am Chem Soc 2002. [DOI: 10.1021/ja00091a016] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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463
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Edema JJH, Meetsma A, Gambarotta S, Khan SI, Smeets WJJ, Spek AL. Ligand and alkali metal cation control on the molecular complexity of anionic chromium(II) aryloxides. Preparation and crystal structure of dimeric (PhO)10Cr2Li6(THF)6 and (2,6-Me2C6H3O)6Cr2Li2(THF)4 and trimeric (GuO)14Cr3Na9Cl [GuO = (o-CH3O)C6H4O] with an encapsulated chloride ion. Inorg Chem 2002. [DOI: 10.1021/ic00019a014] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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464
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Komeda S, Lutz M, Spek AL, Yamanaka Y, Sato T, Chikuma M, Reedijk J. A novel isomerization on interaction of antitumor-active azole-bridged dinuclear platinum(II) complexes with 9-ethylguanine. Platinum(II) atom migration from N2 to N3 on 1,2,3-triazole. J Am Chem Soc 2002; 124:4738-46. [PMID: 11971723 DOI: 10.1021/ja0168559] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reactions of the dinuclear platinum(II) complexes, [[cis-Pt(NH(3))(2)](2)(mu-OH)(mu-pz)](NO(3))(2) (1, pz = pyrazolate), [[cis-Pt(NH(3))(2)](2)(mu-OH)(mu-1,2,3-ta-N1,N2)](NO(3))(2) (2, 1,2,3-ta = 1,2,3-triazolate), and a newly prepared [[cis-Pt(NH(3))(2)](2)(mu-OH)(mu-4-phe-1,2,3-ta-N1,N2)](NO(3))(2) (3, 4-phe-1,2,3-ta = 4-phenyl-1,2,3-triazolate), whose crystal structure was determined, with 9-ethylguanine (9EtG) have been monitored in aqueous solution at 310 K by means of (1)H NMR spectroscopy. The dinuclear platinum(II) complexes 1-3 each react with 9EtG in a bifunctional way to form 1:2 complexes, [[cis-Pt(NH(3))(2)(9EtG-N7)](2)(mu-pz)](3+) (4), [[cis-Pt(NH(3))(2)(9EtG-N7)](2)(mu-1,2,3-ta-N1,N3)](3+) (5), and [[cis-Pt(NH(3))(2)(9EtG-N7)](2)(mu-4-phe-1,2,3-ta-N1,N3)](3+) (6). The reactions of 2 and 3 involve a novel isomerization, in which the Pt atom, initially bound to N2 on the 1,2,3-ta, migrates to N3 after the first substitution by N7 of 9EtG. This isomerization reaction has been unambiguously characterized by 1D and 2D NMR spectroscopy and pH titration. The reactions of 2 and 3 with 9EtG show faster kinetics, and the second-order rate constants (k) for the reactions of 1-3are 1.57 x 10(-4), 2.53 x 10(-4), and 2.56 x 10(-4) M(-1) s(-1), respectively. The pK(a) values at the N1H site of 9EtG were determined for 4-6 from the pH titration curves. Cytotoxicity assays of 1-3 were performed in L1210 murine leukemia cell lines, respectively sensitive and resistant to cisplatin. In the parent cell line, 2 and 3 exhibit higher cytotoxicity compared to cisplatin, especially, 2 is 10 times as active as cisplatin. 1 was found to be less cytotoxic than cisplatin, but still in the active range and more active than cisplatin in a cisplatin-resistant cell line.
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465
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Markies PR, Schat G, Akkerman OS, Bickelhaupt F, Smeets WJJ, Spek AL. Interaction of diphenylzinc with 1,3-xylyl crown ethers. Crystal structures of three 1:1 complexes. Organometallics 2002. [DOI: 10.1021/om00056a025] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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466
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Van Stein GC, Van Koten G, Vrieze K, Brevard C, Spek AL. Structural investigations of silver(I) and copper(I) complexes with neutral nitrogen (N4) donor ligands: x-ray crystal and molecular structure of the dimer [Ag2{.mu.-(R)(S)-1,2-(py-2-CH:N)2Cy}2](O3SCF3)2 and proton, carbon-13, and INEPT silver-109 and nitrogen-15 NMR solution studies. J Am Chem Soc 2002. [DOI: 10.1021/ja00328a031] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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467
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Markies PR, Nomoto T, Akkerman OS, Bickelhaupt F, Smeets WJJ, Spek AL. X-ray structure of (1,3-xylyl-18-crown-5)diphenylmagnesium: an organometallic rotaxane. J Am Chem Soc 2002. [DOI: 10.1021/ja00222a063] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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468
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Wehman E, Van Koten G, Knaap CT, Ossor H, Pfeffer M, Spek AL. Synthesis of cyclometalated (8-methoxynaphthyl)- and [8-(dimethylamino)naphthyl]platinum compounds and their reactivity toward electrophiles. X-ray molecular structures of square-planar (8-methoxynaphthyl)platinum(II) chloride bis(diethyl sulfide) and bis(8-methoxynaphthyl)platinum(II) diethyl sulfide and octahedral fac-bis(8-methoxynaphthyl)methylplatinum(IV) iodide. Inorg Chem 2002. [DOI: 10.1021/ic00297a016] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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469
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Van der Zeijden AAH, Van Koten G, Luijk R, Nordemann RA, Spek AL. Unusual isomerization of ortho-chelated aryliridium(I) complexes, involving a unique sequence of intramolecular carbon-hydrogen bond-making and -breaking processes. X-ray structure of IrI[C6H3(CH2NMe2)2-2,4](COD). Organometallics 2002. [DOI: 10.1021/om00097a017] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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470
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De Graaf W, Boersma J, Smeets WJJ, Spek AL, Van Koten G. Dimethyl(N,N,N',N'-tetramethylethanediamine)palladium(II) and dimethyl[1,2-bis(dimethylphosphino)ethane]palladium(II): syntheses, x-ray crystal structures, and thermolysis, oxidative-addition and ligand-exchange reactions. Organometallics 2002. [DOI: 10.1021/om00114a028] [Citation(s) in RCA: 244] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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471
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Overbosch P, Van Koten G, Spek AL, Roelofsen G, Duisenberg AJM. Synthesis, reactivity, and crystal structure of [1,4-bis(4-tolyl)tetraazabutadiene](.eta.5-cyclopentadienyl)nickel. Inorg Chem 2002. [DOI: 10.1021/ic00141a010] [Citation(s) in RCA: 20] [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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472
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Van Beek JAM, Van Koten G, Ramp MJ, Coenjaarts NC, Grove DM, Goubitz K, Zoutberg MC, Stam CH, Smeets WJJ, Spek AL. Influence of the amino substituents of potentially bis ortho chelating aryl ligands (2,6-{R1R2NCH2}2C6H3)- on the synthesis and properties of their organonickel(II) complexes. Inorg Chem 2002. [DOI: 10.1021/ic00015a023] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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473
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Edema JJH, Stauthamer W, Van Bolhuis F, Gambarotta S, Smeets WJJ, Spek AL. Novel vanadium(II) amine complexes: a facile entry in the chemistry of divalent vanadium. Synthesis and characterization of mononuclear L4VCl2 [L = amine, pyridine]: x-ray structures of trans-(TMEDA)2VCl2 [TMEDA = N,N,N',N'-tetramethylethylenediamine] and trans-Mz2V(py)2 [Mz = o-C6H4CH2N(CH3)2, py = pyridine]. Inorg Chem 2002. [DOI: 10.1021/ic00332a003] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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474
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Van Koten G, Jastrzebski JTBH, Noltes JG, Pontenagel WMGF, Kroon J, Spek AL. Synthesis of C,Sn-chiral triorganotin halides via C-chiral arylcopper and arylgoldlithium intermediates. Crystal and molecular structure of one [2-[1-(S)-(dimethylamino)ethyl]phenyl]methylphenyltin bromide diastereomer. J Am Chem Soc 2002. [DOI: 10.1021/ja00484a018] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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475
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Pattiasina JW, Hissink CE, De Boer JL, Meetsma A, Teuben JH, Spek AL. Formation of a novel .eta.3:.eta.4-1,2,3-trimethyl-4,5-dimethylenecyclopentenyl ligand by hydrogen abstraction from a permethylcyclopentadienyl group in permethyltitanocene carbyl and related systems. J Am Chem Soc 2002. [DOI: 10.1021/ja00311a087] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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