| Abstract: | Gravitational-wave observations reveal that the effective inspiral spin distribution of merging binary black holes is asymmetric about zero, with a significant fraction of negative values. We investigate the plausibility of a triple-star formation channel, within the jittering jets explosion mechanism framework, in which two episodes of common envelope evolution naturally produce spin-orbit misalignment. Using empirically calibrated initial distributions for massive stars, we compute the probability that a zero-age main-sequence system has parameters consistent with this channel and calibrate against observed core-collapse supernova and merger rates. We assess both binary and triple progenitor configurations and examine how the additional requirements of the triple channel — a second companion in a specific mass and period range, and dynamical stability — shape the expected contribution of this pathway to the overall merger rate. We discuss the implications of our results for the role of triple-star systems in the observed population of merging binary black holes. |