@article {678,
	title = {Template effect where 1-3 molecules drive formation of a trimer carceplex},
	journal = {Chemistry-a European Journal},
	volume = {9},
	number = {14},
	year = {2003},
	note = {ISI Document Delivery No.: 706XATimes Cited: 6Cited Reference Count: 46},
	month = {Jul},
	pages = {3253-3262},
	type = {Article},
	abstract = {The template effect in the formation of a trimer carceplex using 1-3 molecules as templates is explored. Thirteen different templates were studied and template ratios were measured for templates of like and unlike molecularity. Five transition-state models were studied for their binding abilities to see if these mirror the template ratios. The chemical shifts of the guests and the thermodynamic and kinetic values for templation suggest that binding is key, often tight, and that the guest determining step is formation of the last covalent bond. The molecular dynamics of guests as well as the conformational dynamics of both hosts and guests further addresses nature of the recognition between host and guest. Finally, we were surprised to discover that water can bind reversibly to the trimer carceplexes, which will have ramifications to any inner phase reactions conducted inside the cage.},
	keywords = {AMPLIFICATION, BARRIER, BINDING, CAPTURE, carceplex, CHEMISTRY, DIELS-ALDER REACTION, DYNAMICS, ELUCIDATION, ENCAPSULATION, HOST-GUEST COMPLEXATION, host-guest systems, molecular recognition, RESORCINARENE CAPSULE, REVERSIBLE, supramolecular, TEMPLATE SYNTHESIS},
	isbn = {0947-6539},
	url = {<Go to ISI>://000184479300009},
	author = {Makeiff, D. A. and Sherman, J. C.}
}
@article {328,
	title = {C-H activation of substituted arenes by tungsten alkylidene complexes: Products, selectivity, and mechanism},
	journal = {Organometallics},
	volume = {21},
	number = {7},
	year = {2002},
	note = {ISI Document Delivery No.: 534QZTimes Cited: 18Cited Reference Count: 35},
	month = {Apr},
	pages = {1474-1486},
	type = {Article},
	abstract = {Thermolyses (70 degreesC, 40 h) of Cp*W(NO)(CH2CMe3)(2) (1) and Cp*W(NO)(CH2CMe3)(CH2C6H5) (2) in xylenes, mesitylene, and a,a,(x-trifluorotoluene generate mixtures of the corresponding aryl and/or benzyl products derived from aromatic sp(2) and benzylic sp(3) C-H bond activations of the solvent molecules by the intermediate alkylidene complexes Cp*W(NO)(=CHCMe3)(sigma-CMe4) (sigma-A) and Cp*W(NO)(=CHC6H5)(sigma-CMe4) (sigma-B), respectively. For instance, the thermolysis of 1 in p-xylene affords products resulting from the activation of one and two molecules of p-xylene. The two products derived from the activation of one solvent molecule are Cp*W(NO)(CH2CMe3)(C6H3-2,5-Me-2) (10) and CP*W(NO)(CH2CMe3)(CH2C6H4-4-Me)(2) (11). The other two complexes derived from the activation of two solvent molecules are Cp*W(NO)(CH2C6H4-4-Me)(C6H4-2,5-Me-2) (12) and Cp*W(NO)(CH2C6H4-4Me)(2) (13). The ratio of the four products in the final reaction mixture is 10:11:12:13 = 1.81 +/- 0.09:0.44 +/- 0.05:1.0:0.15 +/- 0.02. All new complexes prepared have been characterized as fully as possible by conventional spectroscopic methods, and the solid-state molecular structures of Cp*W(NO)(CH2C6H5)(C6H3-3,5-Me-2) (7) and Cp*W(NO)(CH2C6H5)(CH2C6H3-3,5-Me-2) (9) have been established by X-ray diffraction methods. Analyses of the product distributions resulting from the various thermolyses indicate that the benzyl products are increasingly favored over the aryl products as the number of methyl substituents on the solvent molecule increases. Likewise, the movement of the methyl groups from the ortho to meta to para position in the xylenes shifts the aryl vs benzyl product distribution toward the benzyl products. With respect to the aryl product regioselectivities, only the least sterically congested aryl regioisomers are formed in the activations of o- and m-xylene, while the meta and para aryl products are formed preferentially for (x,(x,(x-trifluorotoluene. Finally, the distributions obtained from sigma-B are more abundant in the aryl products than are those obtained from a-A. However, despite these general trends, it is also apparent that the origin of the observed product selectivities is highly dependent on the nature of the substrate, the nature of the C-H activation products, and the intermediate alkylidene complex.},
	keywords = {1, 2-RH-ELIMINATION, ARYL, BOND ACTIVATION, CARBON-HYDROGEN, FUNCTIONALIZATION, HYDROCARBON ACTIVATION, METHANE, MOLYBDENUM, ORGANOMETALLIC NITROSYL CHEMISTRY, REVERSIBLE, THERMOLYSIS},
	isbn = {0276-7333},
	url = {<Go to ISI>://000174599400020},
	author = {Adams, C. S. and Legzdins,Peter and Tran, E.}
}
