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Contents list for Dalton Transactions, issue 1, 2010

Front cover
Dalton Trans., 2010, 39, 1
DOI: 10.1039/B924777G

Contents
Dalton Trans., 2010, 39, 3
DOI: 10.1039/B924778P

Editorial

Dalton Transactions: Increasing Impact
Dalton Trans., 2010, 39, 17
DOI: 10.1039/b923770b

An incredible year for Dalton Transactions saw the impact factor increase by an impressive 11.5%, to reach its highest ever value, 3.58!

Perspectives

Structure-related frustrated magnetism of nanosized polyoxometalates: aesthetics and properties in harmony
Paul Kögerler, Boris Tsukerblat and Achim Müller,  Dalton Trans., 2010, 39, 21
DOI: 10.1039/b910716a

Polyoxometalates serve as a highly versatile source for spin-frustrated molecular magnets that can incorporate from one to twenty spin triangles. Their magnetic characteristics elucidate the intriguing properties associated with frustration.

Multidentate fluorinated alkoxide ligand platforms for oxophilic metal centers: from MOCVD source reagents to polymerization catalysts
Jean-François Carpentier,  Dalton Trans., 2010, 39, 37
DOI: 10.1039/b915172a

Syntheses, structures, and reactivities of some well-defined main group and transition metal complexes supported by multidentate fluorinated alkoxide ligands are presented. Applications in materials chemistry and polymerization catalysis are highlighted.

Communications

Unexpected pincer-type coordination (³-SBS) within a zerovalent platinum metallaboratrane complex
Gareth R. Owen, P. Hugh Gould, Alex Hamilton and Nikolaos Tsoureas,  Dalton Trans., 2010, 39, 49
DOI: 10.1039/b917733g

The first structurally characterised zerovalent platinum complex to contain a tridentate pincer-type coordination mode (³-SBS), is reported.

Unexpected formation of a novel pyridinium-containing catecholate ligand and its manganese(III) complex
Tippu S. Sheriff, Michael Watkinson, Majid Motevalli and Jocelyne F. Lesin,  Dalton Trans., 2010, 39, 53
DOI: 10.1039/b915747f

Chlorobis(3,5,6-trichlorobenzene 4-pyridinium catecholate)manganese(III) is the first complex of this new ligand class to be structurally characterized and is a catalyst in the reduction of O₂ to H₂O₂ under ambient conditions.

3D Mn^II coordination polymer with alternating azide/azide/formate/formate bridged chains: synthesis, structure and magnetic properties
Jiong-Peng Zhao, Bo-Wen Hu, Qian Yang, Xiao-Feng Zhang, Tong-Liang Hu and Xian-He Bu,  Dalton Trans., 2010, 39, 56
DOI: 10.1039/b919048a

A new 3D Mn^II complex containing an alternating azide/azide/formate/formate bridged chain was obtained. The magnetic character reflects the structure of the alternating –J₁J₁J₂J₂– coupled chain.

New alkylzinc complexes with bulky tris(triazolyl)borate ligands: Surprising water stability and reactivity
Mukesh Kumar, Elizabeth T. Papish, Matthias Zeller and Allen D. Hunter,  Dalton Trans., 2010, 39, 59
DOI: 10.1039/b918328k

Bulky alkylzinc complexes, (Ttz^tBu,Me)ZnMe and (Ttz^tBu,Me)ZnEt, show remarkable stability towards water and both complexes crystallize with one molecule of adventitious water hydrogen bonded to two triazole rings; in contrast the less bulky complex, (Ttz^Ph,Me)ZnEt, reacts with water to yield (Ttz^Ph,Me)₂Zn.

Potassium-mediated zincation of ferrocene and ruthenocene: potassium, the architect behind supramolecular structural variations
William Clegg, Ben Conway, Pablo García-Álvarez, Alan R. Kennedy, Jan Klett, Robert E. Mulvey and Luca Russo,  Dalton Trans., 2010, 39, 62
DOI: 10.1039/b917202p

Direct zincation of ferrocene and ruthenocene by a synergic potassium zinc base leads to very different supramolecular aggregates.

Stepwise assembly of a bis-hydroxylaminato gallium–indium complex
Patrick Bösing and Norbert W. Mitzel,  Dalton Trans., 2010, 39, 66
DOI: 10.1039/b913016k

A heterobimetallic gallium–indium complex with a five-coordinate InMe group bonded via two O and two N atoms to a [GaR₂ON(Me)(CH₂)₂N(Me)O]₂ macrocycle shows an enormous coordinative flexibility by 1,2-shifts of the four ON units.

A new binding geometry for an ortho-xylylene-linked bis(NHC)cyclophane: a ruthenium(II) complex with a chelating (¹-NHC)₂:⁶-arene ligand
Murray V. Baker, David H. Brown, Rosenani A. Haque, Brian W. Skelton and Allan H. White,  Dalton Trans., 2010, 39, 70
DOI: 10.1039/b916498g

A Ru complex in which a xylylene-linked bis(NHC)cyclophane chelates the Ru centre through both NHCs and an ⁶-arene is reported. This (¹-NHC)₂:⁶-arene binding mode is new for xylylene-linked NHC-cyclophanes.

Papers

Pt(II) complexes of unsubstituted guanine and 7-methylguanine
Deepali Gupta, Ralf Nowak and Bernhard Lippert,  Dalton Trans., 2010, 39, 73
DOI: 10.1039/b912701a

Of all possible tautomers of unsubstituted guanine present in aqueous solution, (dien)Pt^II selects the 1H,7H-keto form for complexation through N9.

Syntheses and characterization of bis(trifluoromethyl)phosphino naphthalenes and acenaphthenes
Piotr Wawrzyniak, Alexandra M. Z. Slawin, J. Derek Woollins and Petr Kilian,  Dalton Trans., 2010, 39, 85
DOI: 10.1039/b916425a

A convenient synthetic sequence for attachment of bis(trifluoromethyl)phosphino group to an aryl, starting from aryl halide, is reported. This sequence is not disturbed by the presence of another bromine atom positioned at a peri-position to the place of the reaction.

Thermal stability of alkali and alkaline-earth substituted LAMOX oxide-ion conductors
A. Selmi, C. Galven, G. Corbel and P. Lacorre,  Dalton Trans., 2010, 39, 93
DOI: 10.1039/b915080c

Spontaneous demixing of CaMoO₄ solid streams upon heating, with recombination of the exsolved phase by further heating, is shown to originate from a metastability phenomenon in alkaline-earth substituted LAMOX oxide-ion conductors with a T-dependent solid solution limit.

Activation of C–H bonds mediated by MoMo moieties in heterobimetallic Zn/O/Mo clusters
Jian-Gong Ma, Yilmaz Aksu, Laurence J. Gregoriades, Joachim Sauer and Matthias Driess,  Dalton Trans., 2010, 39, 103
DOI: 10.1039/b917585g

Striking reaction of (RO)₃MoMo(OR)₃ with molar excess of ZnMe₂ affords different novel heterobimetallic molybdenum zinc oxo clusters preserving the MoMo triple bond, involving a unique scenario for heterobimetallic C–H bond activation and dehydrogenation of methyl groups.

Hydrothermal syntheses, crystal structures and magnetic properties of two new mixed metal copper(I) sulfites
Pei-Xin Li and Jiang-Gao Mao,  Dalton Trans., 2010, 39, 107
DOI: 10.1039/b916465k

Two new example of the mixed metal copper(I) sulfites, namely, Na₃Mn₂Cu(SO₃)₄(H₂O)₅ ( 1) and NaMn₄Cu(SO₃)₅(H₂O)₃ ( 2), have been synthesized and structurally characterized. They feature 1D and 3D Mn–Cu–SO₃ anionic frameworks, respectively.

High pressure studies of hydroxo-bridged Cu(II) dimers
Alessandro Prescimone, Javier Sanchez-Benitez, Konstantin K. Kamenev, Stephen A. Moggach, John E. Warren, Alistair R. Lennie, Mark Murrie, Simon Parsons and Euan K. Brechin,  Dalton Trans., 2010, 39, 113
DOI: 10.1039/b918287j

The application of hydrostatic pressure imposes significant distortions and modifications in the structures of hydroxide-bridged Cu(II) dimers; changes which are manifested in the magnetic behaviour.

Synthesis and structural and magnetic characterisation of copper(II) complexes of mixed phosphonate-antimonate ligands
Shoaib Ali, Christopher A. Muryn, Floriana Tuna and Richard E. P. Winpenny,  Dalton Trans., 2010, 39, 124
DOI: 10.1039/b913467k

Four new copper cage complexes are reported, based on the reaction of copper acetate with a mixed phosphonate-antimonate ligand. The largest cage is the octametallic copper cage shown.

Reactivity of germanium(II) hydride with nitrous oxide, trimethylsilyl azide, ketones, and alkynes and the reaction of a methyl analogue with trimethylsilyl diazomethane
Anukul Jana, Herbert W. Roesky and Carola Schulzke,  Dalton Trans., 2010, 39, 132
DOI: 10.1039/b914164b

Oxidative addition at germanium(II) with trimethylsilyl diazomethane under migration of a hydrogen atom from a methyl group of the heterocyclic backbone to the terminal nitrogen of the substituted diazomethane.

Synthesis and characterization of xanthene-bridged Schiff-base dimanganese(III) complexes: bimetallic catalysts for asymmetric oxidation of sulfides
Masakazu Hirotsu, Naoki Ohno, Takashi Nakajima, Chie Kushibe, Keiji Ueno and Isamu Kinoshita,  Dalton Trans., 2010, 39, 139
DOI: 10.1039/b909491a

We have developed dimeric manganese complexes with xanthene-bridged salen-type ligands, which have a face-to-face arrangement.

Spin crossover in iron(III) Schiff-base 1-D chain complexes
Tamsyn M. Ross, Suzanne M. Neville, David S. Innes, David R. Turner, Boujemaa Moubaraki and Keith S. Murray,  Dalton Trans., 2010, 39, 149
DOI: 10.1039/b913234a

A systematic magneto-structural study of 1-D iron(III) Schiff base complexes of type [Fe(Schiff base)(L)](BPh₄) has been made where L = 2-connecting di-pyridine or di-imidazole; Schiff base = salen, salophen, acen. High-spin behaviour occurs for salen and salophen species while spin-crossover, with varying T_1/2 values, is observed for the acen series.

Y(BH₄)₃—an old–new ternary hydrogen store aka learning from a multitude of failures
Tomasz Jaro and Wojciech Grochala,  Dalton Trans., 2010, 39, 160
DOI: 10.1039/b910698g

Yttrium borohydride is an efficient novel H₂ storage material.

Dinuclear, tetranuclear and one-dimensional pyrazine-based copper(II) complexes: preparation, X-ray structure and magnetic properties
Consuelo Yuste, Laura Cañadillas-Delgado, Catalina Ruiz-Pérez, Francesc Lloret and Miguel Julve,  Dalton Trans., 2010, 39, 167
DOI: 10.1039/b913274k

The X-ray structure and variable temperature magnetic investigation of the tppz-bridged dicopper(II) complex ( 1) and those of the chromato- ( 2)/molybdato-( 3) bridged copper(II) chain ( 2)/tetranuclear ( 3) compounds are reported.

Dipyrrin based luminescent cyclometallated palladium and platinum complexes
Catherine Bronner, Stéphane A. Baudron, Mir Wais Hosseini, Cristian A. Strassert, Aurélie Guenet and Luisa De Cola,  Dalton Trans., 2010, 39, 180
DOI: 10.1039/b908424j

A series of complexes based on the combination of cyclometallated palladium or platinum moieties with functionalized dipyrrin have been prepared and characterized; these compounds exhibit a characteristic dipyrrin-centered luminescence.

Densely packed Gd(III)-chelates with fast water exchange on a calix[4]arene scaffold: a potential MRI contrast agent
Daniel T. Schühle, Miloslav Poláek, Ivan Luke, Thomas Chauvin, Éva Tóth, Jürgen Schatz, Ulf Hanefeld, Marc C. A. Stuart and Joop A. Peters,  Dalton Trans., 2010, 39, 185
DOI: 10.1039/b917673j

A calix[4]arene based Gd(III) chelate was prepared and characterised in terms of its suitability as an MRI contrast agent. It forms spherical micelles in water at low M concentration and interacts with bovine serum albumin.

A Mn^III triplesalen-based 1D pearl necklace: exchange interactions and zero-field splittings in a C₃-symmetric Mn^III₆ complex
Thorsten Glaser, Maik Heidemeier, Hubert Theil, Anja Stammler, Hartmut Bögge and Jürgen Schnack,  Dalton Trans., 2010, 39, 192
DOI: 10.1039/b912593k

Hexanuclear Mn^III₆ triplesalen complexes are bridged as pearls in a pearl necklace forming a 1D coordination polymer.

Trinuclear ruthenium dioxolene complexes based on the bridging ligand hexahydroxytriphenylene: electrochemistry, spectroscopy, and near-infrared electrochromic behaviour associated with a reversible seven-membered redox chain
Christopher S. Grange, Anthony J. H. M. Meijer and Michael D. Ward,  Dalton Trans., 2010, 39, 200
DOI: 10.1039/b918086a

Trinuclear {Ru(bipy)₂}²⁺ complexes of the triangular ligand hexahydroxytriphenylene can show up to six reversible redox processes linking members of a seven-membered redox chain of which all components have been analysed by UV/Vis/NIR spectroelectrochemistry.

Vanadate complexes in serum: a speciation modeling study
Tamás Jakusch, Annalisa Dean, Tamás Oncsik, Attila Csaba Bényei, Valerio Di Marco and Tamás Kiss,  Dalton Trans., 2010, 39, 212
DOI: 10.1039/b914849c

Based on speciation modeling calculations under serum conditions, apoTf is the primary vanadate binder, even in the presence of the most stable V^V carrier ligands hpno and maltol.

Isocyanate diinsertion into the N–H bond of the 2-pyridylamino ligand of organolanthanides
Yan Sun, Zhengxing Zhang, Xu Wang, Xiaoqing Li, Linhong Weng and Xigeng Zhou,  Dalton Trans., 2010, 39, 221
DOI: 10.1039/b918181d

An unusual ligand-based diinsertion of organolanthanides has been established, which provides a new insight into the reactivity of air-sensitive organolanthanide complexes with unsaturated organic molecules.

Synthesis of InP nanofibers from tri(m-tolyl)phosphine: an alternative route to metal phosphide nanostructures
Junli Wang, Qing Yang, Zude Zhang, Tanwei Li and Shuyuan Zhang,  Dalton Trans., 2010, 39, 227
DOI: 10.1039/b912525f

A general alternative route was proposed for the synthesis of nanostructured III–V and transition-metal phosphides via new Ullmann-type reactions between elemental metals and triarylphosphine compounds.

Synthesis of phosphine substituted -diketiminate based isomeric Ge(II) complexes
N. Dastagiri Reddy, Anukul Jana, Herbert W. Roesky, Prinson P. Samuel and Carola Schulzke,  Dalton Trans., 2010, 39, 234
DOI: 10.1039/b915403e

Synthesis of two isomeric complexes of Ge(II) has been carried out by two different routes and both complexes were characterized by single crystal X-ray diffraction analysis.

Platinum(II) and palladium(II) metallomacrocycles derived from cationic 4,4-bipyridinium, 3-aminopyrazinium and 2-aminopyrimidinium ligands
David Schilter, Jack K. Clegg, Margaret M. Harding and Louis M. Rendina,  Dalton Trans., 2010, 39, 239
DOI: 10.1039/b916579g

A series of cationic, ditopic N-donor ligands based on 4,4-bipyridine (4,4-bipy), 3-aminopyrazine (apyz) and 2-aminopyrimidine (apym), each incorporating two positively-charged N-heterocycles linked by a conformationally-flexible spacer unit, have been synthesised and treated with palladium(II) or platinum(II) precursors [M(2,2-bipy)(NO₃)₂] (M = Pd(II) or Pt(II)) to form highly cationic metallocyclic species.

Trilacunary A--Keggin tungstogermanates and -silicates functionalized with phenyltin(IV) electrophiles
Santiago Reinoso, Luis Fernando Piedra-Garza, Michael H. Dickman, Antonia Praetorius, Monique Biesemans, Rudolph Willem and Ulrich Kortz,  Dalton Trans., 2010, 39, 248
DOI: 10.1039/b910889k

Reaction of (C₆H₅)Sn³⁺ with [A--GeW₉O₃₄]^10- results in the monomeric [{(C₆H₅)Sn(OH)}₃(A--GeW₉O₃₄)]^4- ( 1) as a single product, whereas the analogue [{(C₆H₅)Sn(OH)}₃(A--SiW₉O₃₄)]^4- ( 2), the unprecedented dimeric [{(C₆H₅)Sn(A--H₄SiW₉Sn₂O₃₇)}₂O₂]^6- ( 3) and the sandwich-type [{(C₆H₅)Sn(OH)}₃(A--H₃SiW₉O₃₄)₂]^8- ( 4) are obtained with [A--SiW₉O₃₄]^10-.

Synthesis of 1,3-azaphosphol-2-ones. Crystal and molecular structures of [SP-4-2]-dichlorobis(3-phenyl-1,3-dihydrobenzo[1,3]azaphosphol-2-one-P)palladium(II) and its chloro(methyl)platinum(II) analogue
Justine Bennett, Roy J. Doyle, Hwi-Young Lee, Di Lu, Geoffrey Salem, David J. Speldewinde, Michelle Tifan and Anthony C. Willis,  Dalton Trans., 2010, 39, 256
DOI: 10.1039/b916913j

The first example of a 1,3-azaphosphol-2-one, viz. 4, has been synthesised via the reaction of secondary phosphine (±)-(2-aminophenyl)phenylphosphine with triphosgene in thf.

Dialkylamino cyclopentadienyl ruthenium(II) complex-catalyzed -alkylation of arylacetonitriles with primary alcohols
Hung Wai Cheung, Juan Li, Wenxu Zheng, Zhongyuan Zhou, Yu Hin Chiu, Zhenyang Lin and Chak Po Lau,  Dalton Trans., 2010, 39, 265
DOI: 10.1039/b917805h

Aminocyclopentadienyl ruthenium complexes, [(⁵-C₅H₄NR₂)Ru(PPh₃)₂(CH₃CN)]⁺BF₄^- (R = Me, Et) are moderately active catalysts for -alkylation of arylacetonitriles with primary alcohols; on the other hand, the unsubstituted Cp analogue [(⁵-C₅H₅)Ru(PPh₃)₂(CH₃CN)]⁺BF₄^- shows very low activity.

Back cover
Dalton Trans., 2010, 39, 275
DOI: 10.1039/B924779N

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