Browsing by Author "Bosch, Eric"
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Item Controlling topology within halogen-bonded networks by varying the regiochemistry of the cyclobutane-based nodes(2021) Dunning, Taylor J.; Unruh, Daniel K. (TTU); Bosch, Eric; Groeneman, Ryan H.The formation of a pair of extended networks sustained by halogen bonds based upon two regioisomers of a photoproduct, namely rctt-1,3-bis(4-pyridyl)-2,4-bis(phenyl)cyclobutane (ht-PP) and rctt-1,2-bis(4-pyridyl)-3,4-bis(phenyl)cyclobutane (hh-PP), that have varied topology is reported. These networks are held together via I· · · N halogen bonds between the photoproduct and the halogen-bond donor 1,4-diiodoperchlorobenzene (C6 I2 Cl4). The observed topology in each solid is controlled by the regiochemical position of the halogen-bond accepting 4-pyridyl group. This paper demonstrates the ability to vary the topology of molecular networks by altering the position of the halogen bond acceptor within the cyclobutane-based node.Item Halogen-bonded co-crystal containing 1,3-diiodo-perchlorobenzene and the photoproduct rtct-tetrakis(pyridin-4-yl)cyclobutane resulting in a zigzag topology(2023) Bosch, Eric; Unruh, Daniel K. (TTU); Santana, Carlos L.; Groeneman, Ryan H.The formation and crystal structure of a zigzag network held together by I• • •N halogen bonds is reported. In particular, the halogen-bond donor is 1,3-diiodoperchlorobenzene (C6I2Cl4) while the acceptor is the photoproduct rtct-tetrakis(pyridin-4-yl)cyclobutane (TPCB). Curiously, within the resulting co-crystal (C6I2Cl4)•(TPCB), the photoproduct accepts only two halogen bonds between neighbouring 4-pyridyl rings and as a result behaves as a bent two-connected node rather than the expected four-connected centre. In addition, the photoproduct, TPCB, is also found to engage in C—H• • •N hydrogen bonds, forming an extended zigzag chain.