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This compound may have 2 unpaired electrons (triplet state), see borylene and thus is a diradical. Then the formula should become HB: (see carbene). Does λ¹ indicate this is a boron(I) compound? Simon de Danser (talk) 18:07, 27 September 2020 (UTC)
- @SimonDeDanser: λ¹ does indicate that the atom has only 1 bond. This is the lambda convention.[1] However we would normally write this as λ1 to avoid strange Unicode. Graeme Bartlett (talk) 00:09, 28 September 2020 (UTC)
- Our article and a reference say this is closed shell, and so singlet state. Do you have references that mention triplet/diradical state? Graeme Bartlett (talk) 00:06, 28 September 2020 (UTC)