Electron paramagnetic resonance (EPR) spectroscopy is a powerful method to elucidate molecular structure through the measurement of distances between conformationally well-defined spin labels. Here we report a sequence-flexible approach to the synthesis of double spin-labeled DNA duplexes, where 2′-alkynylnucleosides are incorporated at terminal and internal positions on complementary ... (A) NO- is paramagnetic (B) NO- is isoelectronic with CO (C) the bond energy in is greater than the bond energy in NŒ(D) the bond order in NO - is 2 (E) Il of these statements are false 32. For how many of B2, C2, P2, and F2 does bond order decrease if one electron is removed from the neutral molecule? 33.
Paramagnetic materials have at least one unpaired electron in the system, but diamagnetic materials have all their electrons paired. How is b2 paramagnetic? species like B2 are paramagnetic due to presence of two unpaired electrons in pi 2p bonding molecular orbitals according to molecular orbital theory.