Dalton Transactions

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New expeditions in polar organometallic chemistry

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14179-14180
DOI: 10.1039/C4DT90136C, EditorialEva Hevia
Welcome to this themed issue of Dalton Transactions entitled "New Expeditions in Polar Organometallic Chemistry".
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Unprecedented dinuclear Robson type macrocyclic complexes having two +III metal ions in two compartments and the role of the diimino moiety on the stability of metal ion oxidation states

16 September, 2014 - 11:17

Dalton Trans., 2014, Advance Article
DOI: 10.1039/C4DT01647E, PaperLeena Mandal, Sasankasekhar Mohanta
Robson type macrocyclic complexes: Unique examples of CoIIICoIII compounds with 1,3-diaminopropane but CoIIICoIII compounds with 2,2-dimethyl-1,3-diaminopropane. The systems show catechol oxidase activity.
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Half-sandwich scandium boryl complexes bearing a silylene-linked cyclopentadienyl-amido ligand

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14215-14218
DOI: 10.1039/C4DT01725K, CommunicationBaoli Wang, Masayoshi Nishiura, Jianhua Cheng, Zhaomin Hou
A boryl scandium complex supported by the silylene-linked cyclopentadienyl-amido ligand was synthesized for the first time.
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Synthesis of N,N,O-chelate zinc and aluminum complexes and their catalysis in the ring-opening polymerization of [varepsilon]-caprolactone and rac-lactide

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14470-14480
DOI: 10.1039/C4DT01364F, PaperWei-Li Kong, Zuo-Yun Chai, Zhong-Xia Wang
N,N,O-Chelate zinc complexes efficiently catalyze the controlled polymerization of [varepsilon]-CL and rac-LA and their copolymerization, and the aluminum complexes show good activity for the controlled polymerization of [varepsilon]-CL.
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Complexity in seemingly simple sodium magnesiate systems

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14424-14431
DOI: 10.1039/C4DT00921E, PaperJ. Francos, B. J. Fleming, P. Garcia-Alvarez, A. R. Kennedy, K. Reilly, G. M. Robertson, S. D. Robertson, C. T. O'Hara
Just like Grignard reagents, heteroleptic sodium magnesiate complexes can exhibit a complicated solution chemistry often giving rise to unexpected isolated products, including examples of inverse magnesiates.
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Donor-activated alkali metal dipyridylamides: co-complexation reactions with zinc alkyls and reactivity studies with benzophenone

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14409-14423
DOI: 10.1039/C4DT00914B, PaperDavid R. Armstrong, Etienne V. Brouillet, Alan R. Kennedy, Jennifer A. Garden, Markus Granitzka, Robert E. Mulvey, Joshua J. Trivett
Based on the metallodipyridylamine-dialkylzinc template [{(TMEDA)Na(dpa)}2ZntBu2], new alkali metal dpa complexes have been co-complexed with tBu2Zn, and the co-complexes studied with benzophenone.
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Oxygen insertion reactions of mixed N-heterocyclic carbene-oxazolinylborato zinc alkyl complexes

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14368-14376
DOI: 10.1039/C4DT01011F, PaperSongchen Xu, William C. Everett, Arkady Ellern, Theresa L. Windus, Aaron D. Sadow
An oxazolinyl-carbene borate zinc ethyl compound reacts with O2 at room temperature to provide a monometallic zinc ethylperoxide.
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Synthesis of new heteroleptic strontium complexes

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14461-14469
DOI: 10.1039/C4DT00689E, PaperSheby Mary George, Hyo-Suk Kim, Myoung Soo Lah, Bo Keun Park, Chang Gyoun Kim, Taek-Mo Chung
Synthesis of heteroleptic strontium complexes containing aminoalkoxide and [small beta]-diketonate ligands was demonstrated.
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Synthesis and molecular structure of an abnormal carbene-gallium chloride complex

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14211-14214
DOI: 10.1039/C4DT00933A, CommunicationMingwei Chen, Yuzhong Wang, Robert J. Gilliard, Jr., Pingrong Wei, Nichole A. Schwartz, Gregory H. Robinson
The C4-lithiated N-heterocyclic carbene : BEt3 complex was synthesized by low-temperature lithiation of the N-heterocyclic carbene : BEt3 adduct, which may react with GaCl3 in THF to form the first abnormal N-heterocyclic carbene : GaCl3 complex.
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Lithium heterocuprates: the influence of the amido group on organoamidocuprate structures

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14359-14367
DOI: 10.1039/C4DT00965G, PaperRoberta Bomparola, Robert P. Davies, Stefan Hornaeur, Andrew J. P. White
The structural isomers of a number of lithium heteroamidocuprates LiCuR(NR[prime or minute]2) have been studied in the solid state and in solution, with the steric and electronic properties of the amido group (NR[prime or minute]2) shown to significantly influence the solid-state structures and the position of the solution equilibrium.
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Strong intramolecular calcium-[small pi] interactions with aryl substituents - requirements and limitations

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14440-14449
DOI: 10.1039/C4DT00949E, PaperClaas Loh, Susanne Seupel, Alexander Koch, Helmar Gorls, Sven Krieck, Matthias Westerhausen
The formation of strong bonds between calcium ions and neutral [small pi]-systems requires preorientation of the aryl groups by a sterically protecting ligand sphere.
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Trinuclear alkyl hydrido rare-earth complexes supported by amidopyridinato ligands: synthesis, structures, C-Si bond activation and catalytic activity in ethylene polymerization

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14450-14460
DOI: 10.1039/C4DT00806E, PaperDmitry M. Lyubov, Anton V. Cherkasov, Georgy K. Fukin, Sergey Yu. Ketkov, Andrey S. Shavyrin, Alexander A. Trifonov
[(Ap9MeLu)3([small mu ]2-H)3([small mu ]3-H)2(CH2SiMe3)(thf)2] was synthesized. For Y and Yb C-Si bond activation occurs affording [(Ap9MeLu)3([small mu ]2-H)3([small mu ]3-H)2(CH2SiMe3)(thf)2] and [(Ap9MeLn)3([small mu ]2-H)3([small mu ]3-H)2(CH2SiH2Ph)(thf)2].
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Synthesis and stability of Li/Cl carbenoids based on bis(iminophosphoryl)methanes

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14399-14408
DOI: 10.1039/C4DT01466A, PaperKai-Stephan Feichtner, Viktoria H. Gessner
Bis(iminophosphoryl) substituted Li/Cl carbenoids - accessable via different preparation methods - show high thermal stabilities, which however depend on the N-substituent.
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Homo- and heteroleptic alkoxycarbene f-element complexes and their reactivity towards acidic N-H and C-H bonds

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14346-14358
DOI: 10.1039/C4DT01442A, PaperPolly L. Arnold, Thomas Cadenbach, Isobel H. Marr, Andrew A. Fyfe, Nicola L. Bell, Ronan Bellabarba, Robert P. Tooze, Jason B. Love
The reactivity of a series of organometallic rare earth and actinide complexes with hemilabile NHC-ligands towards substrates with acidic C-H and N-H bonds is described.
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Probing solvent effects on mixed aggregates associating a chiral lithium amide and n-BuLi by NMR: from structure to reactivity

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14219-14228
DOI: 10.1039/C4DT01156B, PaperGabriella Barozzino-Consiglio, Mathieu Rouen, Hassan Oulyadi, Anne Harrison-Marchand, Jacques Maddaluno
NMR shows a direct correlation between the concentration of a chiral lithium amide/n-BuLi complex and ees of a test reaction.
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Heterometallic aluminates: alkali metals trapped by an aluminium aryloxide claw

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14377-14385
DOI: 10.1039/C4DT00952E, PaperM[a] Teresa Munoz, Tomas Cuenca, Marta E. G. Mosquera
In the heterometallic species prepared [AlMMe2{2,6-(MeO)2C6H3O}2]n (M = Li, Na and K), the {AlMe2{(2,6-(MeO)2C6H3O}2}- moiety acts as a claw that grasps alkali metals of very different sizes.
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Hydrometallation of amino-trialkynylsilanes - intramolecular M-N interactions (M = Al, Ga) and potential activation of Si-N bonds

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14386-14398
DOI: 10.1039/C4DT00922C, PaperWerner Uhl, Jorg Bohnemann, Benedikt Kappelt, Alexander Hepp, Marcus Layh
Hydrometallation of amino-alkynylsilanes afforded highly functionalized alkenyl-alkynylsilanes with a fascinating diversity of intramolecular donor-acceptor interactions.
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New avenues in the directed deprotometallation of aromatics: recent advances in directed cupration

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14181-14203
DOI: 10.1039/C4DT01130A, PerspectivePhilip J. Harford, Andrew J. Peel, Floris Chevallier, Ryo Takita, Florence Mongin, Masanobu Uchiyama, Andrew E. H. Wheatley
Advances in directed aromatic deprotometallation are reported in the context of recent developments in our understanding of lithium cuprates.
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Scandium versus yttrium{amino-alkoxy-bis(phenolate)} complexes for the stereoselective ring-opening polymerization of racemic lactide and [small beta]-butyrolactone

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14322-14333
DOI: 10.1039/C4DT01206B, PaperYulia Chapurina, Joice Klitzke, Osvaldo de L. Casagrande Jr., Mouhamad Awada, Vincent Dorcet, Evgueni Kirillov, Jean-Francois Carpentier
5-Coordinate, THF-free scandium complexes are less active but provide a better control than their 6-coordinate, THF-coordinated analogous yttrium complexes for the heteroselective ring-opening polymerization of rac-lactide.
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Syntheses, structures and flexible coordination of sterically demanding di- and "tri"-lithiated methandiides

16 September, 2014 - 11:17

Dalton Trans., 2014, 43,14334-14345
DOI: 10.1039/C4DT01185F, PaperChristian P. Sindlinger, Andreas Stasch
Sequential lithiation of a sterically demanding bis(iminophosphoranyl)methane afforded di- and trianionic methandiide lithium complexes and their structures and coordination behaviour have been studied with solid state and solution methods.
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