Research and Development

@article{Fabicon2001b,

title = {Formation of Coordinated RZn(macrocycle)+ Cations and Organozincate Anions from Reactions of Organozinc Compounds and Macrocycles},

author = {Ronaldo M. Fabicon and Herman G. Richey Jr.},

url = {https://pubs.acs.org/doi/abs/10.1021/om0102798},

doi = {10.1021/om0102798},

year  = {2001},

date = {2001-08-07},

journal = {Organometallics},

volume = {20},

number = {19},

pages = {4018-4023},

abstract = {An RZnZ compound (R = alkyl) and a macrocycle react in benzene to form RZn(macrocycle)+ ions when the macrocycle is an effective coordinator for RZn+ and Z- can exist as the anion or become attached to an organometallic acceptor to form an organometalate anion. R2Zn and R3Al form RZn(macrocycle)+R4Al- with 14N4 (1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane), 15N5 (1,4,7,10,13-pentamethyl-1,4,7,10,13-pentaazacyclopentadecane), 2,1,1-cryptand, or 2,2,1-cryptand but not with 1,4,7,10,13,16-hexamethyl-1,4,7,10,13,16-hexaazacyclooctadecane, 2,2,2-cryptand, 15-crown-5, or 18-crown-6. RZnZ, R2Zn, and 14N4 form RZn(14N4)+R2ZnZ- when Z is Cl, Br, I, or 3,5-di-tert-butylphenoxy but not when Z is tert-butoxy. Various combinations of RZnZ with Z = Cl, Br, I, 2,6-di-tert-butylphenoxy, or 3,5-di-tert-butylphenoxy and 14N4, 15N5, 2,1,1-cryptand, or 2,2,1-cryptand form RZn(macrocycle)+Z- solids; solids do not form when Z is methoxy or tert-butoxy nor when the macrocycle is 12-crown-4, 15-crown-5, or 18-crown-6.},

keywords = {absorption, anions, ions, macrocycles, nuclear magnetic resonance spectroscopy},

pubstate = {published},

tppubtype = {article}

}

@article{Fabicon1999,

title = {Interactions of Organozinc Compounds with Crown Ethers and Cryptands:  Formation of R2Zn(18-crown-6) Rotaxanes},

author = {Ronaldo M. Fabicon and Masood Parvez and Herman G. Richey Jr.},

url = {https://pubs.acs.org/doi/abs/10.1021/om990468e},

doi = {10.1021/om990468e},

year  = {1999},

date = {1999-11-01},

journal = {Organometallics},

volume = {18},

number = {24},

pages = {5163-5169},

abstract = {Several pieces of evidence indicate that R2Zn(18-crown-6) rotaxanes are components of solutions prepared from some R2Zn (R = alkyl or aryl) compounds and 18-crown-6, and crystal structures show that Et2Zn(18-crown-6) and Ph2Zn(18-crown-6) solids that precipitate from such solutions have rotaxane structures. By contrast, the R2Zn compounds do not form rotaxanes with 15-crown-5 or its nitrogen equivalent, 1,4,7,10,13-pentamethyl-1,4,7,10,13-pentaazacyclopentadecane. Disproportionation of R2Zn by macrocycles to form coordinated RZn+ cations and R3Zn- anions is less favorable than the corresponding reaction with R2Mg, although Tol2Zn (Tol = p-methylphenyl) and 2,1,1-cryptand do form TolZn(2,1,1-cryptand)+Tol3Zn-.},

keywords = {absorption, chemical structure, ethers, macrocyclic compounds, rotaxanes},

pubstate = {published},

tppubtype = {article}

}