2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/77250We classify real 6-dimensional nilpotent Lie algebras for which the corresponding Lie group has a left-invariant complex structure, and estimate the dimensions of moduli spaces of such structures.Improved section 4, 20 pages, to appear in J Pure Appl AlgebraDifferential GeometryRings and Algebras17B30; 32G05; 53C30text