Crystal structures and vibrational spectroscopy of neutral platinum(IV) amine iodo complexes

Thiele, G.; Danzeisen, O.; Rotter, H.; Goanta, Mirela

doi:10.1016/s0022-2860(98)00841-2

Cited by 6 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reactions of platinum(II) complexes of, for example, Group 15 donor ligands with iodine can give Pt(IV)-iodides (e.g. [Pt(4,7-Ph 2 phen)I 4 ], 39 and [cis-Pt(ethylamine)I 4 ] 36 ), but may also leave the metal centre un-oxidised (leading reportedly to Pt(II) poly-iodides as in the case of [Pt(1,2-dimethylimidazole) 4 ](I 3 ) 2 40 ). The crystal structure of trans-bis(N-benzoyl-N'-propylthiourea- The product crystallizes in a P 1 space group with the Pt(II) ion located at an inversion centre, which ensures that the coordinated PtS 2 I 2 moiety is strictly planar.…”

Section: Crystal and Molecular Structure Of The Inclusion Compound Tr...mentioning

confidence: 99%

Reactions of halogens with Pt(ii) complexes of N-alkyl- and N,N-dialkyl-N′-benzoylthioureas: oxidative addition and formation of an I2 inclusion compound

et al. 2005

View full text Add to dashboard Cite

The treatment of cis-[Pt(II)(L(1a/b)-S,O)2] complexes of N,N-diethyl- (HL(1a)) and N,N-di(n-butyl)-N'-benzoylthiourea (HL(1b)) with I2 or Br2 in chloroform, leads to rapid oxidative addition to yield several geometric isomers of [Pt(IV)(L-S,O)(2)X(2)](X = I, Br); the reactions can be monitored by (195)Pt NMR and UV-visible spectrophotometry. The products cis-[Pt(IV)(L(1a)-S,O)2I2] and cis-[Pt(IV)(L(1a)-S,O)2Br2], which have been isolated and structurally characterized, are the first-reported crystal structures of complexes of Pt(iv) with this class of ligand. Molecules of 6 pack such that the I-Pt-I axes are essentially aligned, with unusually close nearest-neighbour iodide contacts (3.553(1)A). These short II intermolecular interactions lead to infinite chains of weakly connected molecules in crystals of the compound. No such interactions are evident in the corresponding crystals of . Reaction of the Pt(II) complex of N-propyl-N'-benzoylthiourea (H2L(2a))cis-/trans-[Pt(II)(H2L(2a)-S)2Br2] with Br2 also results in oxidative addition, to yield trans-Pt(IV)(H2L(2a)-S)2Br4. By contrast, treatment of cis-/trans-[Pt(II)(H2L(2a)-S)2I2] with I2 does not lead to an oxidative addition product, yielding instead an interesting iodine inclusion compound of Pt(II), trans-[Pt(II)(H2L(2a)-S)2I2.I2. In 8, short intermolecular II distances of 3.453(1)A between I2 and coordinated iodide ions in trans-[Pt(II)(H(2)L(2a)-S)(2)I(2)] molecules, result in infinite chains of weakly linked trans-[Pt(II)(H2L(2a)-S)2I2]...I2 groups in the lattice. However, the empirically estimated bond order of 0.75 for the included I2 molecules does not support the possible existence of discrete tetraiodide ions (I4(2-)) in the lattice of compound 8.

show abstract

Section: Crystal and Molecular Structure Of The Inclusion Compound Tr...mentioning

confidence: 99%

Reactions of halogens with Pt(ii) complexes of N-alkyl- and N,N-dialkyl-N′-benzoylthioureas: oxidative addition and formation of an I2 inclusion compound

et al. 2005

View full text Add to dashboard Cite

show abstract

“…[29] These contacts are typically very weak, however, and it is unclear whether they should be characterized as XB. [30] Polyhalides 2À ,w hich form linear XB adducts in crystal structures if the terminal halides are coordinated by further interactions,m ay also feature AEXBs. [31] However,i ti s debatable whether these complexes feature direct anionanion interactions or if ab etter description would be the interaction of two anions with the same neutral XB donor (I 2 ).…”

Section: Introductionmentioning

confidence: 99%

“Anti‐Electrostatic” Halogen Bonding

et al. 2020

View full text Add to dashboard Cite

Halogen bonding is often described as being driven predominantly by electrostatics,a nd thus adducts between anionic halogen bond (XB) donors (halogen-based Lewis acids) and anions seem counterintuitive.S uch" anti-electrostatic" XBs have been predicted theoretically but for organic XB donors,t here are currently no experimental examples except for afew cases of self-association. Reported herein is the synthesis of two negatively charged organoiodine derivatives that form anti-electrostatic XBs with anions.E ven though the electrostatic potential is universally negative across the surface of both compounds,D FT calculations indicate kinetic stabilization of their halide complexes in the gas phase and particularly in solution. Experimentally,s elf-association of the anionic XB donors was observed in solid-state structures, resulting in dimers,trimers,and infinite chains.Inaddition, cocrystals with halides were obtained, representing the first cases of halogen bonding between an organic anionic XB donor and adifferent anion. The bond lengths of all observed interactions are 14-21 %s horter than the sum of the van der Waals radii.

show abstract

“…In prior work, it is only the Pt(II) complexes that act as catalysts [7,8], and here the Pt(II) complexes When a water molecule approaches the catalyst's surface, a distribution of delocalized electron density leads to an intimate contact between the orbitals of the water molecule and the catalyst's localised d-orbitals. In prior work, it is only the Pt(II) complexes that act as catalysts [7,8], and here the Pt(II) complexes When a water molecule approaches the catalyst's surface, a distribution of delocalized electron density leads to an intimate contact between the orbitals of the water molecule and the catalyst's localised d-orbitals.…”

Section: Resultsmentioning

confidence: 99%

Use of Some Complexes of Platinum in the Radiolytic Decomposition of Water

Goanta¹,

Cecal²

2004

BioInorganic Reaction Mechanisms

View full text Add to dashboard Cite

TThe radiolysis of water in the presence of complexes of Pt with amines and iodine acting as catalysts of the hydrogen production is reported. A radionuclide of 60 Co with an activity of about 5x10 4 Ci was employed as an irradiation g source. A considerable increase of the amount of hydrogen resulting from the radiolysis of water in the presence of the above mentioned complex combinations was noticed in comparison with the reference sample, irradiated under the same experimental conditions, but without any catalyst. The products have been identified by means of a method based on mass spectrometry. A mechanism for the catalysed reaction is proposed.

show abstract

Crystal structures and vibrational spectroscopy of neutral platinum(IV) amine iodo complexes

Cited by 6 publications

References 7 publications

Reactions of halogens with Pt(ii) complexes of N-alkyl- and N,N-dialkyl-N′-benzoylthioureas: oxidative addition and formation of an I2 inclusion compound

Reactions of halogens with Pt(ii) complexes of N-alkyl- and N,N-dialkyl-N′-benzoylthioureas: oxidative addition and formation of an I2 inclusion compound

“Anti‐Electrostatic” Halogen Bonding

Use of Some Complexes of Platinum in the Radiolytic Decomposition of Water

Contact Info

Product

Resources

About